Matter
What are the three main states of matter?
Solid, liquid, gas
What is the center of an atom called?
Nucleus
What do we call a substance that is made when two or more elements combine?
Compound
What do acids taste like?
Sour
What type of energy does food give our bodies?
Chemical Energy
What happens when a liquid turns into a gas?
Evaporation
What charge does an electron have?
Negative
What gas do humans breathe out that plants need for photosynthesis?
CO2 (Carbon Dioxide)
What color does blue litmus paper turn when dipped in an acid?
a) green
b)red
c) purple
d) yellow
b) Red
What do we call energy from the Sun?
Solar Energy
What property of matter describes how much space it takes up?
Volume
What determines electron shells?
The Periods on the Periodic Table (Rows)
What happens when iron is exposed to oxygen and water over time?
It rusts
What do we call substances that are neither acidic nor basic?
Neutral
What happens to the particles in a substance when you heat it up?
They move fast.
When water freezes, what state of matter does it become?
Solid
What is the chemical symbol for oxygen?
O
What is the term for a solid that forms when two liquids are mixed in a chemical reaction?
Precipitate
What number on the pH scale represents a neutral substance?
a) 5
b) 6
c) 7
d)8
c) 7
What type of energy is stored in food and fuel?
Potential Energy
What do you call a substance that is made of only one type of atom?
Element
How many valence electrons does the element Xenon have?
54
What is the process called when a substance changes from one form to another but is still the same substance?
Physical Change
What do bases feel like when touched?
a) sticky
b) slimy
c) slippery
d) sludgy
What type of energy is produced when a candle burns?
Heat and Light Energy