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
How does the pH of an acid differ from the pH of a base?
What is an acid is below 7 and a base is above 7.
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
What type of reaction does the following reaction represent: AB + C--> AC + B?
What is single displacement.
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
When you increase the size of a planet, does the gravitation pull increase or decrease? Why?
What is increase because the mass of the planet increases.
300
Is the following chemical equation balanced: H20--> H2 + O2?
What is no
300
What is the purpose of a catalyst?
What is to speed up a reaction.
300
What are the two products of a neutralization reaction?
What is salt and water.
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
Which object has more inertia: a bowling ball or car? Explain.
What is a car because it has more mass.
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
Describe how the solar system has formed.
What is a solar nebula collapses, solar nebula flattens and rotates, planetesimals form, planetesimals grow, planetesimals collide to form planets, the sun and solar system are born
500
Balance the following chemical equation: __Na + __Cl2 --> ___NaCl
What is 2Na + Cl2 --> 2NaCl
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
Can you use the property of the ability to conduct electricity to determine if something is an acid or a base? Explain.
What is no because both acids and bases can conduct electricity.
500
Give your own example of an endothermic and exothermic reaction that has not been used today.