Chemical Reactions Review

Word Cloud

Write 1-2 words that come to mind when you think back on the Chemical Reactions Unit.

Word Cloud

A sign of a chemical reaction that you remember...

Categorize

Options (9)

Cooking an egg

Rusting of iron

Baking a cake

Photosynthesis in plants

Digestion of food

Breaking a glass

Chopping vegetables

Stretching a rubber band

Inflating a balloon

Sort these examples into chemical vs physical reactions.

Chemical Reaction

Physical Reaction

Open Ended

What were the signs of a chemical reaction from the photo of burning paper?

Multiple Select

Which of the following statements are true about the Law of Conservation of Mass as shown in the images?

• Matter is not created or destroyed in a chemical reaction

• The total mass of reactants equals the total mass of products

• Atoms are rearranged during a chemical reaction

• The mass of products is always less than the mass of reactants

Open Ended

Give me 1 example of a property of matter and it's definition. What can properties of matter tell us about a substance?

Multiple Choice

Which of the following is true about a chemical change?

• The properties of a substance will change.

• The substance only changes its phase.

• The substance remains exactly the same.

• No new substances are formed.

Multiple Select

Which of the following are examples of phase changes?

• Melting

• Freezing

• Burning

• Evaporating

Closed Vs Open Systems

Matter may escape into the enviornment.

​Open system

Matter is kept in a contained space.

Closed System

Open Ended

Samantha cooks an egg that weighed 50 grams without it's shell. She fries the egg and knows that a chemical reaction has occurred. She says that the chemical reaction does NOT follow the law of conservation of mass though, because after it was cooked it now weighs 45 grams. Is Samantha correct or incorrect? Why?

Open Ended

What is one example of a chemical change that you learned about today, and why is it considered a chemical change?