Answer:
The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.
Explanation:
Answer:
The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.
What type of energy transformation is happening?
a boy sliding his foot across the floor
A Electrical energy is created by friction when his foot slides across the floor.
B The mechanical energy of his foot moving across the floor is transformed into chemical energy.
C When his foot is sliding across the floor, it creates heat energy through friction.
D When his foot rubs against the floor, the energy of motion changes into light energy.
Photosynthesis occurs. How do plants get the carbon dioxide they need for photosynthesis?
I need help assappp
...........
Which observation shows that a substance is malleable?
O A. The substance can be stretched easily into wires.
O B. The substance flattens out when struck with a hammer
O C. The substance breaks apart when stretched.
O D. The substance shatters when struck with a hammer.
Answer:
the answer is B
Explanation:
the definition of malleable is- able to be hammered or pressed permanently out of shape without breaking or cracking
Answer:
Explanation:
The substance flattens out when struck with a hammer. Took test.
Which oneeee is ittt!!!!
Answer:
Disagree.
Explanation:
Nothing would remain. Everything on Earth is made up of atoms. The chair consists of only atoms. So, if you remove all of the atoms, nothing would be left! Hope this helps.
One atom of carbon _____.
has four electron shells
is part of all inorganic compounds
forms a special shape called a tetrahedron
can bond with up to four other atoms
Answer:
One atom of carbon:
does not has four electron shells
cannot form a special shape called a tetrahedron
is not part of all inorganic compounds
so only right ans left: can bond with up to four other atoms
How many atoms doesCo(NO3)2 have
Compound: ________________
. Found in soil; contains hydrogen (H) and oxygen (O)
Answer:
hydrogen im doing the same thing but diffrent
Explanation:
Think of a creative title for a video about the states of matter
Answer:
States of life ?
Explanation:
maybe this ?
What are some ways your body regulates the increase of body temperature that also occurs when exercising?
Answer:
Doing push-ups
Explanation:
When you workout you get hot so the tempeture of ur body increase.
Some ways by which your body regulates the increase of body temperature that also occurs when exercising are evaporation of sweat and skin blood flow.
What is effect of exercising on body temperature?
Our muscles quickly deplete stored energy when you start exercising. To make more energy, muscles combine oxygen with adenosine triphosphate or ATP. This process creates heat energy as a byproduct. Muscles generate the most heat because they produce so much energy.
Extra heat raises your body temperature, so your body needs to eliminate heat as quickly as possible.
Therefore, some ways by which your body regulates the increase of body temperature that also occurs when exercising are evaporation of sweat and skin blood flow.
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Select the substance or substances that are homogeneous mixtures
Question 22 options:
Solution
Compound
Colloid
Molecule
Suspension
Answer:
colloid, suspension, solution
Charlie is doing a scientific investigation about the properties of light energy. For his experiment, he points a flashlight at a mirror and then at a basketball. Which of the following best describes what Charlie would observe?
A The light traveled through both objects and refracted which made them appear bigger.
B The light was completely absorbed by both objects, and he could see white and blue.
C When the flashlight was pointed at the mirror, the light reflected in the same direction. When the flashlight was pointed at the basketball, the light was reflected in different directions.
D When the flashlight was pointed at the mirror, the light was absorbed. When the flashlight was pointed at the basketball, the light was refracted in a different direction.
Answer:
its not a its c
i think
Explanation:
When the flash light is pointed to a mirror it absorb some of the light and when it is pointed to the basket ball the light will refract in a different direction.
What is refraction?Refraction is an optical phenomenon in which the light changes is direction or bends when going from one medium to the other.
Mirror is transparent and will absorb and reflect light. Whereas, basket ball is opaque and never shows any reflection or absorption of light. Thus light when travel from air to the solid and then to air it bends in its direction.
Therefore, option D, that is the flashlight is absorbed by the mirror and refracted by basket ball in different direction is correct.
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What is radiation?????????????
Answer:
Radiation is the emission of energy through space in the form of particles and/or waves. Nuclear reactions are very different from chemical reactions. In chemical reactions, atoms become more stable by participating in a transfer of electrons or by sharing electrons with other atoms.
Radiation is said to be the transfer of heat between two objects without any medium between them , that can help them in heat transfer . Hence radiation is said to be the direct transfer of heat between two objects . For example the heat we get from the sun can be said to be from radiation as there is nothing between us and the sun that is helping the sun's heat reach us . The sun's heat reaches Earth directly . This is an example of radiation; which is a type of heat transfer .
Where is the DNA stored in a cell?
Answer: nucleus
Explanation:
Which of the following represents two molecules of carbon dioxide?
C 2O 2
CO 2
2C 2O 2
2CO 2
Answer:
CO 2 is the correct answer.
Explanation:
Answer:
Co2
Explanation:
What harmful rays does the atmosphere block?
ANSWER: UV rays from the sun.
The Ozone layer blocks those rays.
Hope this helps!
Answer: UV-C and UV-B are harmful rays the atmosphere blocks
What are elements and how do they differ?
Answer:
Explanation:
Compound
A compound contains atoms of different elements chemically combined together in a fixed ratio.
Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule. Elements that compose the compound are chemically combined.
A compound can be separated into simpler substances by chemical methods/reactions.
A huge, virtually limitless, number of chemical compounds can be created. Compounds are classified into molecular compounds, ionic compounds, intermetallic compounds and complexes.
A compound is represented using its chemical formula that represents the symbols of its constituent elements and the number of atoms of each element in one molecule of the compound
Element
An element is a pure chemical substance made of same type of atom.
Elements contain only one type of atom. Each atom has the same atomic number i.e., the same number of protons in their nucleus.
Elements cannot be broken down into simpler substances by chemical reactions.
There are about 117 elements that have been observed. Can be classified as metal, non-metal or metalloid.
An element is represented using symbols.
Answer:
element is defined as ONE substance. it's a pure substance and contains only oNE type of atom
1. Explain what the process of respiration is.
2. List at least 6 of the organs or structures which exist in the
respiratory system.
3. When we exercise, why do we breathe harder?
Answer:
The process of respiration is breathing
Explanation:
Please help me out!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
22 grams, 5 x 3 x 1 = 15 / volume. mass (330) ÷ 15 (volume) = 22 grams (density)
Answer:
22g
Explanation:
You can use the formula to get density but to get there you need to know volume. Volume is length x width x height. V= 3x5x1. Volume is 15. Then you take your mass and divide it by volume to find density. D= 330/15. The density is 22g.
Which statement describes a chemical property of gasoline?
O A. It melts at -57°C.
O B. It is highly flammable.
O C. It is a clear liquid.
O D. It has a density of 0.7 g/cm3.
most of the substances around us are ________
compounds
free atoms
pure elements
Answer:
free atoms
Explanation:
Answer:
Compounds is the answer i think
Explanation:
A compound consists of two or more kinds of atoms.
Why is it important to have a control?
IN SCIENCE.....SOUND CONTROL
P.S don't make it sound like ur a genius
Pls help this is due in 5 mins!!!! Brainlest to the best answer and 20 points
Every Cell in the body requires oxygen for respiration so that sufficient energy can be produced. Carbon dioxide, a waste product, is also produced and needs to be removed.
Therefore, the levels of both gases must be regulated. How does this explain the changes in our pulse rates
Answer:
Your pulse will go higher or lower, This explains the changes in our pulse rate because, our heart is having to work twice as hard. Our heart is having to work twice as hard because while its producing oxygen its also getting rid of the Carbon Dioxide. while you are jogging or doing any physical activity than your body requires alot of energy and produce a lot of carbon dioxide which causes the heart to beat fast as to remove co2 and take o2 from the blood leading to higher rate of pulse. on the secon hand if you are sedentary , consumption and production of o2 and co2 respectively will decrease leading to the slow beating of heart leading to low pulse
Explanation:
Match the part of the wave to its description
Answer:
Crest Highest Point of the wave
Trough Lowest Point of the wave
Amplitude the height from mid point to the crest or trough
Wavelength Distance from one crest to another
The match of the wave is
Crest ⇒ Highest point of the wave.
Trough ⇒ Lowest point of the wave.
Amplitude ⇒ Height from mid point to the crest or trough
Wavelength ⇒ Distance from one crest to another.
What is wavelength?Wavelength the distance a wave travels in the time it takes a medium particle to complete one vibration. The letter k stands for it. The meter is its SI unit.
What is amplitude?
Amplitude can be referred to as the maximum displacement caused by the vibrating particle. A is the symbol for it. The meter is its SI unit.
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Question 6(Multiple Choice Worth 3 points)
(02.01 MC)
What is the landform in the image
Dune
Hill
Plateau
River
Answer:
C (Plateau) :)
Explanation:
Because a plateau is an area of relatively level high ground. so that means the answer is plateau!
Which of the following statements best defines the Law of Conservation of Mass?
Mass cannot be created but it can be destroyed under extreme presures
Mass cannot be conserved during a chemcial reaction: a little bit of mass is always lost
The mass cannot be created nor destroyed
Mass can be created and destroyed
Answer: mass cannot be created or destroyed.
Explanation:
Energy cannot be created or destroyed and mass is an energy!
What is a diaphragm? What does it do?
The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.
Explanation:
Diaphragm contracts and expands when you breathe air
Answer:
A diaphragm on a microscope is the piece that enables the user to adjust the amount of light that is focused under the specimen being observed. A diaphragm is typically found on higher-power microscopes versus less expensive or toy models. The diaphragm is located directly under the stage or platform where user places the specimen or slide.
Explanation:
Which oneeeeeeeeeeeee
Answer:
Agree
Explanation:
This is what I found.
Air is actually a collection of very small molecules; oxygen gas and nitrogen gas are molecules made from two atoms each. Only the noble gases readily exist as single atoms.
Hope this helps.
Answer:
Air is actually a collection of very small molecules; oxygen gas and nitrogen gas are molecules made from two atoms each. Only the noble gases readily exist as single atoms.
Explanation:
I hope this helps. I'm not sure because it would depend on the gas. But I would go with disagree personally.
Compound: _________________
. Found in air; contains carbon (C) and oxygen (O)
Answer:
Explanation:
Contian power
Match the terms
1.the total energy of any closed system, including all internal kinetic and potential energy of the system
2.a measure of the average kinetic energy of particles in an object
3.something that flows into a substance
Terms-
Temperature
Heat
Thermal Energy
Answer:
1-thermal energy, 2-tempurature, 3-heat
Explanation:
The correct match of the terms and their definitions are:
1. Thermal energy – the total energy of any closed system, including all internal kinetic and potential energy of the system.
2. Temperature – a measure of the average kinetic energy of particles in an object
3. Heat – something that flows into a substance
What is thermal energy?Thermal energy is the energy that is formed by heat. It is produced when the temperature of a body increases. This cause the molecules and atoms to run or move fast or collide with each other.
Heat is a form of energy that is produced when the temperature of a substance increases. Heat, thermal energy, and temperature are interconnected to each other.
When the temperature rises, the heat or thermal energy in the body increase, which cause the movement of atoms faster, and the atoms collide with each other.
Thus, the correct match is 1- thermal energy, 2- temperature, and 3- heat.
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