Vocabulary
Lava from a volcano cools and forms rocks.
physical change, solidification
give an example of element and what kind of matter it is.
any element from the periodic table (gold, oxygen, silver, hydrogen) , pure substance
give an example of light and thermal energy
sun and light
A change in mateer where two or more substances combine and form a new substance.
a chemical change
adding wood to fire and it turns to ash
chemical change, burning
give two examples of heterogenous mixtures.
sandwich, salad, pizza, chocolate chip cookies
give an example of electrical energy
strom clouds , batteries
what change of state happens when a gas touches a cooler surface and becomes a liquid?
Condensation
When a solid turns into a liquid. example: ice cream in the sun
physical change, melting
Give 2 examples of homogeneous mixtures.
orange juice, blood, coffee, saltwater, air
give examples of chemical energy
food, wood, fuel, coal,
what state of matter takes the shape of its container and can't be compressed?
Liquid
chemical change, cooking
Can't be separated into other substances by physical methods.
Pure substances
what is mecahnical energy
when change occurs due to motion. example: a moving car,
Evaporation
Iron reacts with air and water and forms a reddish- brown susbstance.
chemical process, rusting
name 2 examples of compounds you have learned in class.
Water(H2O) and Salt (NaCl)
What are the two types of energy sources? give defenitions
Renewable energy, sources regenerate quickly and naturally and Non-renewable energy, sources do not regenerate quickly and they pollute the enviornment.