Charlie hypothesizes that if he adds earthworms to a compost pile, it will decompose twice as fast as a compost pile without earthworms. Which of the following steps could compromise his experiment?

Which energy source do plants use to produce sugar

When would the national weather service consider fog to be dense

The hare curls up to stay warm. It has a short tail and ears that hold in body heat. The hare would most likely live in a tundra biome. true r false

Henry touched a hot plate and immediately moved his finger away from it. Which best explains the integumentary system's role in this reaction? Oil in the skin sensed the temperature difference. Nerve endings in the skin responded to the heat.

Which of these factors best explains why liquid water exists on earth? a. weak salinity of earth's oceans b. earth's strong gravity c. presence of living things on earth d. freezing temperatures at earth's poles

Do we have 23 or 46 chromosomes

Best evidence of oxygen cycling

If the pallid-winged grasshopper population decreases dramatically, describe what will most likely happen to each other animal population in the food web and why.

Why exactly is the Sphinx more in danger of deterioration than the Statue of Liberty?

Which organism is an autotroph?