Q: Q: What planet is closest to our sun? Read this paragraph and choose the correct option from the provided answers: Mercury is very close to the Sun, so it can get very hot. Mercury also has virtually no atmosphere. As the planet rotates very slowly, the temperature varies tremendously. In direct sunlight, the surface can be as hot as 427C (801F). On the dark side, the surface can be as cold as 183C (297F)! The coldest temperatures may be on the insides of craters. Most of Mercury is extremely dry. Scientists think that there may be a small amount of water, in the form of ice, at the planet's poles. The poles never receive direct sunlight. Choices: - Earth - Venus - Pluto - mercury A:
A: mercury

Q: Q: While climate change in earth history was due to natural processes, what is primarily to blame for recent global warming? Read this paragraph and choose the correct option from the provided answers: Climate change in Earth history was due to natural processes. Recent global warming is due mainly to human actions. The burning of fossil fuels releases greenhouse gases into the air. This creates greater greenhouse effect and global warming. Choices: - wars - volcanos - factories - human actions A:
A: human actions

Q: Q: Plant cuttings are an example of what type of reproduction? Read this paragraph and choose the correct option from the provided answers: Choices: - homosexual - heterosexual - autosexual - asexual A:
A: asexual

Q: Q: What is used to date older fossils? Read this paragraph and choose the correct option from the provided answers: Choices: - search engines - litmus testing - electron microscopes - radioactive isotopes A:
A: radioactive isotopes