Matter and Change CFA 2024

1. Matter is anything that has _____ and takes up _____.

• cells, matter
• space, matter
• matter, space
• molecules, space

2. When an atom has an equal number of protons and electrons, the electric charge of a(n) _____ cancels out the positive charge of a(n) _____, resulting in an atom that has no overall charge.

• proton, neutron
• neutron, electron
• electron, proton
• proton, electron

3. The outermost electrons are called _____.

• electrons
• valence electrons
• negative electrons
• positive electrons

4. What element is the most abundant in our universe?

• oxygen
• helium
• neon
• hydrogen

5. What two elements make up most of the Earth's crust?

• calcium, sodium
• silicon, oxygen
• aluminum, iron
• potassium, magnesium