Bosko, 2020-21, Science Cumulative

We used the mixing of baking soda and vinegar as an example of:

• particle movement.

• a chemical reaction.

• an atom.

• the atomic number.

In our chemical reaction, the baking soda and vinegar are the:

• Reactants.

• Products.

• Atoms.

• Beakers.

Particles ________ when heat energy is added.

• move faster

• move slower

• lose electrons

• gain protons

When we add heat to a solid it usually becomes

• a gas.

• a liquid.

• a solid.

• heavy.

A gas is produced by

• removing heat from a liquid.

• removing heat from a gas.

• adding heat to a liquid.

• adding cold to a liquid.

A freezer ________ to freeze objects.

• adds cold

• removes heat

• doesn't do anything but sit there

Hydrogen's atomic number is 1, this means

• there is one neutron in the nucleus.

• there is one electron in the nucleus.

• only one proton is in the first orbital.

• there is one proton in the nucleus.

The nucleus of an atom has

• protons and electrons.

• protons and neutrons.

• protons, electrons and neutrons.

• neutrons and electrons.

Electrons

• orbit the nucleus and have a negative charge.

• orbit the nucleus and have a positive charge.

• are in the nucleus and have a negative charge.

• are in the nucleus and have a positive charge.

A neutral atom

• has the same number of electrons as protons.

• has the same number of neutrons as protons.

• has the same number of electrons as neutrons.

• has more electrons than protons.