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Unit 1 Test Prep1
Chemical Equations
Chemical Reactions
Unit 1 Test Prep 2
Exothermic/Endothermic Reactions
100
What is the difference between mass and weight?
What is mass is the amount of matter within an object and weight is the gravitational pull on the object.
100
What is the difference between a reactant and a product?
What is the reactant is on the left-hand side of a chemical equation and the product is to the right of the yield sign.
100
How do you know a chemical change has taken place?
What is a new substance has formed, odor, gas released, precipitate has formed, or color change.
100

Favorite appropriate TikTok Dance

Ayyyeee!

100
What is the difference between an exothermic and endothermic reaction?
What is an endothermic reaction absorbs heat and an exothermic reaction releases heat.
200
What are the two factors that affect gravity?
What is mass and distance.
200

Name the elements and number of each element in the following compound: 3NO2

What is 3 nitrogen and 6 oxygen

200

Endothermic Reactions do what?

Absorb energy

Reactants + Heat → Products

200
Describe two properties of acids and two properties of bases.
What is answers will vary.
200
Is melting an endothermic or exothermic reaction?
What is endothermic
300

Each person in the group pic another person and play rock, paper scissors!

Winners, take a bow!

300

Define what a pure substance is.

What is substances that are made up of only one kind of particle and have a fixed or constant structure. 

300

Compound or element: H2O

What is a Compound
300

Exothermic Reactions do what?

Release energy

Reactants → Products + Heat

300
On which side of the equation is the heat located for an endothermic reaction? Exothermic?
What is reactant side for endothermic and product side for exothermic.
400

How many atoms are in this equation: 3NH02

What is 12.

400
When you balance chemical equations, why does it need to follow the law of conservation of mass?
What is matter cannot be created nor destroyed, so there needs to be an equal number of atoms for each side of the equation.
400
Which of the following would react the fastest: an Alka-Seltzer tablet or a tablet broken into pieces? Why?
What is the tablet broken into pieces because the surface area is increased.
400
What type of substance would you need to neutralize a strong base? Explain.
What is a strong acid because they will cancel out to become neutral.
400
Would a running car engine be an endothermic or exothermic reaction? Explain.
What is exothermic because heat is being released.
500

what does this symbol mean in science?

----->

What is yields

500

LMMS 7th grade science classes are conducting experiments. They measured each substance before the chemical reaction and after the reaction. They noticed that the mass of the substances before was the same as in the end. This is held true by which scientific law?

The Law of conservation of mass.

500
Compare and contrast synthesis and decomposition reactions.
What is they are both types of reactions, but synthesis has one product and multiple reactants where as a decomposition reaction has one reactant and multiple products.
500

What is an atom?

the basic unit of a chemical element.

500
Give your own example of an endothermic and exothermic reaction that has not been used today.
What is answers will vary.