4th Grade MYF Science Review Flashcard

Front

What is reflection in terms of light?

Back

Reflection is the bouncing back of light rays when they hit a surface, such as a mirror.

Front

What happens to a population when its predators disappear?

Back

The population of the prey, such as grasshoppers, will likely increase due to less predation.

Front

What is a lever?

Back

A lever is a simple machine that helps lift or move heavy objects. Examples include scissors and seesaws.

Front

What do decomposers do in an ecosystem?

Back

Decomposers break down dead plants and animals into nutrients, returning them to the soil.

Front

What is gravitational pull?

Back

Gravitational pull is the force that attracts objects towards each other, such as the Earth pulling objects down.

Front

What is refraction?

Back

Refraction is the bending of light rays as they pass from one medium to another, like air to water.

Front

What is absorption in terms of light?

Back

Absorption is when light is taken in by an object and not reflected or transmitted.

Front

What is an example of a non-lever?

Back

A deck screw is not a lever; it is a fastener.

Front

What is the role of producers in an ecosystem?

Back

Producers, like plants, make their own food using sunlight through photosynthesis.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their environment.