1. Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is-

Compounds are different than elements because compounds are-

3. How many different elements are represented in the chemical formula? CH4 + 2O2  CO2 + 2H2O

Which of the following is the best description of an element?

Which of the following is a compound?

All of the following are organic compounds except-

9. Organic compounds can be distinguished from inorganic compounds because organic compounds always-

Which two elements will be found in most organic compounds?

Which of the following is an example of a physical change in the digestive system?

In digestion, evidence of a chemical change can be observed when -

Which of the following is an example of a chemical change in the digestive system?

In digestion, evidence of a chemical change can be observed when -

Which of the following is an example of a physical change in digestion?

Which of the following is an example of a physical change that occurs during digestion?

During Digestion, which of the following energy conversions occurs?

A bird that eats seeds converts the energy stored in the seeds into the energy of its flight muscles. The conversion is from what kind of energy to what other kind of energy?

Green plants use sunlight to make their own food in the form of glucose, this process, known as photosynthesis is an example of which of the following energy conversions.

Animals are able to move by using the energy from the food they eat. This conversion is from what type of energy to what other type of energy?

Which of the following organisms regularly transforms radiant energy into chemical energy?

Roots grow downward in the soil in response to –

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