Show:
Atoms
Elements
Compounds
Abundant Elements
Review
100

True or false? Matter is conserved.

True

100

True or false? Elements are made up of only one type of atom.

True

100

A compound is when ___ or ________ atoms of different elements combine.

2 or more

100

Based on the data below, what is the most abundant element in the Earth's crust?


Oxygen - 47%

Silicon - 28%

Aluminum - 8%

Iron - 5%

Oxygen at 47%

100

What tool is used to measure temperature?

thermometer!

200

True or false? Atoms are the basic building blocks of matter.

True!

200

An element can be represented by a(n) _____________ ______________.

element/chemical symbol

200

A compound can be represented by a: 

chemical formula

200

What is the most abundant element in the ocean?

Chlorine: 55%

Sodium: 30%

Sulfate: 8%

Chlorine at 55%

200

Which conclusion is best for this experiment? A student tested how the temperature of water affects how quickly sugar dissolves. The student recorded the time it took for a sugar cube to dissolve in cold water (5 minutes), room temperature water (3 minutes), and warm water (1 minute).

a) Sugar dissolves slower in warm water

b) Sugar dissolves faster in warm water

c) Temperature has no affect on how fast sugar dissolves

d) sugar dissolves the same for all water temperatures

b) Sugar dissolves faster in warm water

300

Match the subatomic particle to the charge. Positive, negative, neutral

Proton: 

Neutron: 

Electron: 

Proton: positive

Neutron: neutral

Electron: negative

300

Elements differ by their number of ___________. (protons, neutrons, or electrons).

protons

300

Chemical bonds are the forces that hold atoms together to form new substances. These bonds are formed with _______________ (protons, neutrons, electrons).

electrons

300

What is the most abundant element in the atmosphere?

Nitrogen: 78%

Oxygen: 21%

Other: 1%

Nitrogen at 78%

300

Based on the data below, who did the most pushups in gym?

Oliver - 36

Max - 93

Jordan - 30

Alyssa - 28

Max at 93!

400

The nucleus includes which two subatomic particles?

protons and neutrons

400

What is the chemical symbol for Nitrogen? Use the periodic table!

N

400

What elements make up the compound CO₂?

Carbon and Oxygen

400

What is the most abundant element in living things?

Oxygen: 65%

Carbon: 19%

Hydrogen: 10%

Nitrogen: 3%

Oxygen at 65%

400
You need an instrument to record the time it took you to get to school in the morning. What scientific tool would you use?
stopwatch/timer!
500

In a neutral atom, the number of ________ and _______ are equal, while the number of _________ may vary.

In a neutral atom, the number of PROTONS and ELECTRONS are equal, while the number of NEUTRONS may vary.

500
How many protons does Oxygen have? Remember, the number of protons is equal to the atomic number.

8

500

In a chemical reaction, __________ are regrouped into different molecules and the new _________ is created.

reactants, products
500

What is the least abundant element in living things?

Oxygen: 65%

Carbon: 19%

Hydrogen: 10%

Nitrogen: 3%

Nitrogen at 3%

500

Identify the independent, dependent, and a constant variable from the experiment!

A student wants to find out how the amount of sunlight affects the growth of a plant. They place one plant in full sunlight, one in partial sunlight, and one in the shade. All plants receive the same amount of water and soil. Each week, the plant growth (height) is measured.

Independent: amount of sunlight

Dependent: growth of a plant

Constant: amount of water, amount of soil