Unit 1 & Unit 2 Science Test

These flashcards include topics on law of conservation of energy and homeostasis

What is the Law of Conservation of Energy?

Energy cannot be created or destroyed, only transferred or transformed.

What is energy?

The ability to do work or cause change

What is energy transfer?

Energy moving from one object to another.

What is energy transformation?

Energy changing from one form to another (e.g. electrical → light).

Give an example of energy transformation.

A light bulb: electrical energy → light + heat energy.

What is kinetic energy?

Energy movement

What is potential energy?

Energy that is stored (Gravitational potential energy)

What happens to energy in a system?

Total energy stays the same, even if it changes form.

What is wasted energy?

Energy that is spread out and not useful (often heat or sound).

Why is energy never “lost”?

It is always transferred to another form, even if we can’t use it.

What is homeostasis?

The process of which an organism maintains its internal conditions to keep it from overheating or overcooling.

Why is homeostasis important?

It keeps the body functioning properly.

What are examples of homeostasis?

Body temperature, blood glucose levels, water balance.

What is normal human body temperature?

Approximately 37

What happens if body temperature rises?

Sweating and increased blood flow to skin to cool down.

What happens if body temperature drops?

Shivering and reduced blood flow to conserve heat.

What is a stimulus?

A change in the internal or external environment.

What is a response?

The body reacting to a stimulus