Q: What trend is occurring involving the extent of arctic sea ice in summer? Choices: - slow decrease - water decrease - Ice growth - rapid decrease A:
rapid decrease

Q: Where does all igneous rock come from? Choices: - the moon - stratosphere - oceans - magma or lava A:
magma or lava

Q: Q: What are membrane-bound organelles with their own dna called? Choices: - vacuoles - chromosomes - ribosomes - plastids A:
A: plastids

Question: Q: What number is the sum of the numbers of protons and neutrons present in the nucleus of an atom? Choices: - nuclear number - combined number - mass total - mass number A:
Answer: mass number

*Question*
Q: What are algae that live in colonies of hundreds of cells called? Choices: - chlorophyta - euglenids - rhodophyta - volvox A:
**Answer**
volvox

Q: Q: In a magnet, what are the regions called that are the strongest? Choices: - positives - plates - negatives - poles A:
A: poles