This is a substance that tastes bitter and feels slippery.
What is a base?
100
To identify an object that is pure metal, you could use which of the following to identify it: melting point, length, shape, or mass.
What is metling point?
100
Which of the following is an example of a physical change: salt mixing with water, wood burning, acid eating away at metal, liquid that bubbles and gets colder.
What is salt mixing with water?
100
A student weighs a plate, knife, and stick of butter then cuts it into smaller pieces. Describe the weight of the items before and after cutting.
What is they will weigh the same becuase the amount of butter has not changed?
100
Acid or Base: This turns litmus paper red.
What is an acid?
200
Which of the following is true about acids: cabbage juice turns pink (pH <7), cabbage juice turns green (pH >7), they taste bitter, or they do not react with metals.
What is they turn cabbage juice pink and have a pH less than 7?
200
To identify a clear liquid in a container that is a pure substance, you could use which of the following to identify it: weight, volume, temperature, or boiling point.
What is boiling point?
200
Which of the following is an example of a chemical reaction: marshmallow turning black over a fire, powder dissolving to make lemonade, ice cube melting, salt crystals being crushed.
What is marshmallow turning black over a fire?
200
A student add water and sugar to a jar and seals it so nothing can get in or out and weighs it. After some sugar dissolves, the student weighs the jar again. What will happen to the weight after the sugar dissolves?
What is the weight will stay the same?
200
See slide 3. This image represents different molecules that are physically mixed together but no chemical reaction occurs. (hint: compound, atom, molecule, or mixture)
What is a mixture?
300
Acids are described as corrosive due to this.
What is "eat away" at other materials?
300
A student has a ball of wax that is a pure substance and removes a small piece from it. Which is true about what happens to the mass and melting point of the ball of wax after the piece is removed?
What is the mass of the ball of wax changes and its melting point stays the same?
300
Two white powders were mixed together. A chemical reaction occurred and a yellow powder was formed. What is the relationship between the yellow powder and the white powders? (hint: use terms atoms and combined)
What is the yellow powder is made up of the same kinds of atoms as the white powders, but the atoms are combined into different molecules?
300
A chemical reaction is taking place in a sealed container, what will happen to the mass of the materials in this sealed container?
What is the mass will stay the same?
300
Which of the following could be a sign of a chemical change: bubbles, change in temperature, change in color, or all of these.
What is all of these?
400
A solution has a pH of 9 and turns cabbage juice green or yellow is this.
What is basic?
400
See slide 4. Could any of the liquids be the same?
What is none of the liquids are the same substance?
400
See slide 1. Which of the following could represent a chemical reaction?
What is D?
400
A student places baking soda and lemon juice in a sealed bag so nothing can escape. After the two items are mixed, bubbles formed and the bag expands. What happens to the final weight of the bag and its contents?
What is the final weight will be the same as the starting weight because the number of each kind of atom does not change during the experiment?
400
If your science teacher spilled hydrochloric acid (HCl), you could do this to neutralize the HCl: add vinegar, add baking soda, add salt water, add nothing and wait for it to evaporate.
What is add baking soda, which is a base?
500
A neutralization reaction produces these.
What are water and a salt?
500
See slide 5. Which of the above liquids could be the same substance?
What are liquids 1 and 2?
500
A student stirs liquids 1 and 2 together and two different liquids form (liquid 3 and 4). How does the student know a chemical reaction has occured?
What is liquids 3 and 4 have different properties than liquids 1 and 2?
500
A student has two different liquids in OPEN jars. She pours one liquid into the other and observes bubbles and after the bubbling stops she weighs both jars and finds the weight is less than when she started. How can her observation be explained?