Greenhouse gases include carbon dioxide and methane. How do greenhouse gases act to increase air temperatures near Earth's surface?
A. They transmit visible light that enters the atmosphere.
B. They trap heat that is radiated from the surface.
C. They reflect heat that enters the atmosphere.
D. They emit heat when they undergo chemical reactions.

Answer:

B, They trap heat that is radiated from the surface.

Explanation:

Greenhouse gases are more complex than other gas molecules in the atmosphere, with a structure that can absorb heat. They radiate the heat back to the Earth's surface, to another greenhouse gas molecule, or out to space. There are several different types of greenhouse gases.

PLZZZ HELP!!! I NEED HELP DESPERATELY!!
What is the gain of FADH₂ per pyruvic acid in the citric acid cycle?

What type of trees looses their leave on fall

In your own words, define or describe what you
already know about photosynthesis?

Which of the following
perform cellular respiration?
(2A)
All living things
Only animals
Only humans and plants
Only plants

Question 1 (2 points)
How did we define homeostasis?

Question 1 options:

Actively changing due to an environmental stimulus


Taking “raw” materials and turning it into a usable energy


The ability to increase in size and complexity


Regulation of bodily functions to stay within a certain range

Question 2 (2 points)
Saved
A hypothesis can be described as

Question 2 options:

a testable explanation.


a theory.


a law.


a wild guess.

Question 3 (2 points)
You notice you begin to sweat whenever the door to your bedroom is closed. This is most closely related to which step in the scientific method?

Question 3 options:

making an observation


forming a hypothesis


forming a conclusion


recording data

Question 4 (2 points)
In an experiment, the variable being tested or changed is the

Question 4 options:

control variable


dependent variable


responding variable


independent variable

Question 5 (1 point)
Match each of the following terms with the correct definition?

dependent variable


controls or constants


independent variable


hypothesis

1.
An testable explanation to explain a natural phenomenon

2.
the variables that are held constant in an experiment

3.
the variable that is measured as data in an experiment

4.
the variable that is controlled by the experimenter

Question 6 (2 points)
Some chickens lay an egg every day. Other chickens produce few eggs. A study is planned to examine some factors that might affect the number of eggs produced by chickens. Which of the following is NOT a suitable hypothesis for the study?

Question 6 options:

If the cage for the chickens is larger, they will produce more eggs.


If more eggs are produced by the chickens, they will lose more weight.


If there is more protein in the feed, then more eggs are produced.


If chickens receive more hours of light, then they will produce more eggs.

Question 6 (2 points)
Some chickens lay an egg every day. Other chickens produce few eggs. A study is planned to examine some factors that might affect the number of eggs produced by chickens. Which of the following is NOT a suitable hypothesis for the study
If the cage for the chickens is larger, they will produce more eggs.


If more eggs are produced by the chickens, they will lose more weight.


If there is more protein in the feed, then more eggs are produced.


If chickens receive more hours of light, then they will produce more eggs.

Sam wished to investigate how fertilizer run-off affects the growth of algae in freshwater lakes and streams. He set his experiment up as follows. He placed 900 ml of water into each of five 1000 ml glass beakers. To each beaker, he added 5 ml of water from an aquarium which contained a large concentration of algae. The beakers were placed under a lamp which was on a timer to provide 12 hours of light each day. Liquid fertilizer was added to the beakers in the following amounts.

Each week, a random sample from each of the beakers was examined under a microscope to get a count of the number of algal cells present.

What is the independent variable in this experiment?

how do 2 siblings from the same parents look different to each other

Help please!!!!!!!!!!!!

Why does ice cream melt and is it a physical change or chemical change

What do these two changes have in common?
breaking a piece of glass
knitting yarn into

Why is biodiversity so high in tropical rainforests yet so low in tundra and desert biomes?

Don came up with the hypotheses that butterflies prefer to eat nectar from white flowers Don conduct an experiment and learn that his hypotheses with not correct what should Don do next

In a healthy ecosystem, which trophic level should
have the most energy? Why? *WILL MARK BRAINLIEST*

which types of rock can be the source of deposited sediment

Which of the following statements correctly describe centrioles? Check all that apply.

A) Centrioles are only found in animal cells.
B) Spindle fibers are connected to centrioles.
C) Centrioles are only present during metaphase.
D) Chromosomes and centrioles are made of the same materia

which statement accurately describes bioaccumulation:
1) a substance, such as a pesticide, collects in the body of an organism over time.
2) the concentration of a substance increases as it moves up the food chain
3) a method to get rid of an invasive species in an ecosystem
4) pesticides in the soil, air and water become sources of pollution.

In the box provided explain why living organisms
contain more hydrogen atoms than any other
atoms, yet 65% of a typical organism's mass is
oxygen
І

It is possible for organisms to reproduce both sexually and asexually?
Your answer:
True or false

Nemo, a marine fish (adapted for life in the sea salt water ) is placed inside a freshwater aquarium. The next day, the owner finds that he has perished(died) in the tank! Why?

9. Iron (Fe) is an element found on the Periodic Table. Iron's atomic number is 26.
Which of the following properties would iron not be expected to have based on its
placement on the Periodic Table?
A Good electrical insulator
B Highly malleable and ductile
C Shiny, metallic luster
D Conducts heat well
HELP!

Which molecule can freely diffuse through the cell membrane?

Oxygen

Nitrogen

Hydrogen

Glucose

Which of these Earth spheres interacts with coral reefs to cause coral bleaching?

Atmosphere
Cryosphere
Geosphere
Hydrosphere

what are the 3 major purposes for the cell cycle

34. Animals store most of their excess energy reserves as _______ because
A. glucose; it is easy to break down.
B. fat; they store twice as much energy per gram.
C. protein; it is a compact source of energy in their bodies.
D. carbohydrates; they store twice as much energy per gram of glucose.

Which statement explains a difference between a cell wall and a cell membrane?

Which organs are part of the excretory system?
A. gizzard, beak B. stomach, esophagus C. large intestine, small intestine D. kidney, bladder

Question 1 of 5
Which two layers in this model represent parts of Earth that combine to form
the lithosphere?
A
B
с
D
О А. А
ОВ. С
Ос. В
ODD

which two products are bromelain likely to produce when breaking down proteins
amino acids
fatty acid
monosaccharides
nucleic acid
polypeptides
disaccharides

Help please!!!!!!!!!!!!!!!!!!

Metals have properties that we use when we walk into safe buildings, use electricity, or cook food .
TRUE OR FALSE?

What would be the end result of mitosis if the DNA did not replicate during interphase?