7th Grade Science DCA Review

Front

What effect does an increase in temperature have on the kinetic energy of particles in a solid?

Back

It increases kinetic energy, causing particles to move further apart.

Front

Which helps protect the earth from radiation?

Back

Atmosphere.

Front

What keeps the planets in orbit around the sun?

Back

Gravity.

Front

What celestial body is the center of our solar system, around which every object orbits?

Back

The Sun.

Front

What can we infer about tree fossils found in the desert?

Back

The area was once home to many trees and has not always been a desert.

Front

Define kinetic energy.

Back

The energy that an object possesses due to its motion.

Front

What is the role of the atmosphere in relation to Earth?

Back

It protects Earth from harmful radiation and helps maintain temperature.

Front

Explain the concept of gravity.

Back

A force that attracts two bodies towards each other, keeping planets in orbit around the sun.

Front

What is a solar system?

Back

A collection of celestial bodies, including a star and the objects that orbit it, such as planets and moons.

Front

What is the significance of the Sun in our solar system?

Back

It is the central star that provides light and heat, enabling life on Earth.