⚛️ Matter & Atoms
Anything that has mass and takes up space.
What is matter?
Ice melting is what type of change?
What is physical?
How many grams are in 1 kilogram?
What is 1,000 g?
A substance that reacts with another substance is called a…
What is a reactant?
The science that studies matter and its changes.
What is chemistry?
The smallest unit of an element that keeps its properties.
What is an atom?
Wood burning is what type of change?
What is chemical?
Which unit is commonly used for measuring liquid volume in the lab?
What is mL?
The substances formed during a chemical reaction
What are products?
Why does salt seem to disappear when stirred into water?
What is it dissolves?
The three main particles found in an atom.
What are protons, neutrons, and electrons?
A substance has a mass of 20 g and volume of 10 mL. What is its density?
What is 2 g/mL?
(The formula for density is mass divided by volume)
A balance reads 25.0 g. What does the .0 tell you?
What is precision?
Rust forming on iron is an example of what?
What is a chemical reaction?
Why does a metal spoon feel colder than a wooden spoon in the same room?
What is metal transfers heat faster?
An atom has 8 protons but 10 electrons. What is its charge?
What is −2?
A mystery substance forms bubbles when mixed with another substance. What might this indicate?
What is a chemical reaction?
Which is more precise: 5 g or 5.00 g?
What is 5.00 g?
A reaction produces a gas, but the container is sealed. Does the matter disappear?
What is no?
A balloon gets smaller when placed in a freezer. What happened to the gas particles?
What is they moved slower/occupied less volume?
Two atoms have the same number of protons but different numbers of neutrons. What are they?
What are isotopes?
A student cuts a piece of copper in half. Did the density change?
What is no?
An object has a mass of 50 g and density of 5 g/mL. What is its volume?
What is 10 mL?
(volume = mass/density)
Why must chemical equations be balanced?
What is conservation of matter?
You mix two clear liquids and the container becomes warm. What does this suggest?
What is an exothermic reaction?
(An exothermic reaction is a chemical process that releases energy to the surroundings, usually as heat, light, or sound)