Study guide for grade 7: Science Concepts

Front

Warm air masses tend to be ________ dense and flow over cool air masses.

Back

less

Front

Evaporation can occur when water gains energy from the sun and changes into water vapor. True or False?

Back

True

Front

Which of the following is an example of humans influencing the inheritance of desired traits in organisms? Breeding corn stalks with the most ears of corn, Allowing plants to grow wild, Not selecting for any traits, Ignoring genetic differences.

Back

Breeding corn stalks with the most ears of corn

Front

Gas formation is evidence of a ________.

Back

chemical reaction

Front

If the deer is eating more shrubs, the shrub population would ________.

Back

decrease

Front

What is the process called when water changes from liquid to gas?

Back

Evaporation

Front

What is the term for the variety of different species in an ecosystem?

Back

Biodiversity

Front

What is the main source of energy for the Earth's climate system?

Back

The Sun

Front

What do we call the movement of energy through a food chain?

Back

Energy flow

Front

What is the term for a change in a substance that does not alter its chemical composition?

Back

Physical change