Q: Q: Soft cartilage gradually turns into hard bone through what process? A:

OPTIONS:
- oxidation
- elongation
- calcification
- ossification

A: ossification

input: OPTIONS:
- the Earth
- fossil fuels
- the Moon
- the sun Now, answer this question: Q: What is the source of most of the energy used? A:
A:
output: the sun

Q: What forms when the dna in the nucleus wraps around proteins? A:

OPTIONS:
- rna
- genes
- ribosomes
- chromosomes

Answer: chromosomes

Problem: OPTIONS:
- pollution insulators
- sunlight insulators
- warmth insulators
- thermal insulators
Q: Q: What are materials that are poor thermal conductors called? A:
Answer: thermal insulators

Problem:OPTIONS:
- consumers to producers
- decomposers to producers
- refiners to consumers
- producers to consumers

Q: Food chains carry energy from what group to what group? A:
****
A: producers to consumers

Problem:OPTIONS:
- regulates it
- raises it
- increases it
- lowers it

Q: A solute generally does what to the freezing point of a solvent? A:
****
A:
lowers it