5th Grade Science Quiz: What Do You Know About Momentum?

Explanation
Momentum is defined as the product of an object's mass and velocity in classical mechanics. It is a fundamental concept that describes the motion of an object and its resistance to changes in motion. The greater the mass or velocity of an object, the greater its momentum. Momentum plays a crucial role in understanding and analyzing the behavior of objects in motion, such as collisions and interactions between particles.

Explanation
Electrons are smaller than atoms. Atoms consist of a nucleus (containing protons and neutrons) surrounded by electrons. Electrons are negatively charged subatomic particles that orbit the nucleus. They have a much smaller mass compared to protons and neutrons, making them the smallest particles within an atom. Therefore, electrons are smaller than atoms.

Explanation
Countershading is a form of adaptation characterized by the shark's body. This adaptation involves having a dark coloration on the upper side of the body and a lighter coloration on the underside. This helps the shark to blend in with its surroundings and provides camouflage from both predators below and prey above. The dark coloration on the upper side helps the shark to be less visible when seen from above, while the lighter coloration on the underside helps it to blend in with the brighter surface when seen from below. This adaptation is beneficial for hunting and avoiding being hunted.

Explanation
The statement "Asteroids have no moon" is not true because some asteroids do have moons. For example, the asteroid named Ida has a moon called Dactyl. Therefore, this statement is incorrect.

Explanation
When the switch is off, the electric circuit is open. This means that there is a gap in the circuit, preventing the flow of electric current. The open switch breaks the continuous path for the electricity to flow, creating an open circuit.