What are the three states of matter?
Solid, liquid, gas
What is matter?
Anything that has mass and takes up space
What form of energy is stored energy?
Potential energy
What form of energy is energy of motion?
Kinetic energy
What is a mixture?
Two or more substances combined without forming a new substance
What is an example of chemical energy?
Food or batteries
What does a thermometer measure?
Temperature
What is gravity?
A force that pulls objects toward each other
What is the largest source of light for Earth?
The Sun
What is a galaxy?
A large group of stars, gas, and dust
What is the difference between a physical and chemical change?
Physical changes don’t create a new substance; chemical changes do
What is conduction?
Heat transfer through direct contact
What is convection?
Heat transfer through movement of fluids (liquids/gases)
What is radiation?
Heat transfer through waves (like sunlight)
What is a food web?
: A network of connected food chains
What are decomposers
Organisms that break down dead matter
What is an atom?
The smallest unit of matter
What is the role of the Sun in the water cycle?
It provides energy for evaporation
What causes tides?
he gravitational pull of the Moon
What is Earth’s atmosphere?
The layer of gases surrounding Earth
What is the difference between renewable and nonrenewable resources?
Renewable can be replaced quickly; nonrenewable cannot
What is energy conservation?
Saving energy by using less or using it efficiently
What is mass?
The amount of matter in an object
What is a constellation?
A pattern of stars in the sky
Why do we see different phases of the Moon?
Because of the Moon’s position relative to Earth and the Sun