Vocab

Question 1

What is the reaction rate?

Answer 1

How fast a chemical reaction happens.

Question 2

What is an inhibitor?

Answer 2

Slows down a chemical reaction.

Question 3

What is activation energy?

Answer 3

Minimum energy needed to start a reaction.

Question 4

What are products in a chemical reaction?

Answer 4

Substances made in a chemical reaction.

Question 5

What is a catalyst?

Answer 5

Speeds up a reaction without being used up.

Question 6

What are reactants?

Answer 6

Substances that start a chemical reaction.

Question 7

What is the law of conservation of mass?

Answer 7

Mass is not lost or gained in a reaction.

Question 8

What is a coefficient?

Answer 8

Number in front of a formula that tells how many molecules.

Question 9

What is a chemical reaction?

Answer 9

Process where substances change into new ones.

Question 10

What is the law of conservation of energy?

Answer 10

Energy can’t be created or destroyed.

Question 11

What is a chemical equation?

Answer 11

Symbols showing what happens in a chemical reaction.

Question 12

What does luminous mean?

Answer 12

Gives off its own light (like the sun).

Question 13

What does illuminated mean?

Answer 13

Lit by another source (like the moon).

Question 14

What does transparent mean?

Answer 14

Lets all light through; objects are clear.

Question 15

What does translucent mean?

Answer 15

Lets some light through; objects appear blurry.

Question 16

What does opaque mean?

Answer 16

Lets no light through; you can’t see through it.

Question 17

What is a convex mirror?

Answer 17

Curved outward, reflects light outward.

Question 18

What is a concave mirror?

Answer 18

Curved inward, focuses light to a point.

Question 19

What is a convex lens?

Answer 19

Curved outward, focuses light to a point.

Question 20

What is a concave lens?

Answer 20

Curved inward, spreads light outward.

Question 21

What is terminal velocity?

Answer 21

The highest speed an object reaches when falling.

Question 22

What is inertia?

Answer 22

Resistance to change in motion.

Question 23

What is acceleration?

Answer 23

A change in speed or direction.

Question 24

What is centripetal acceleration?

Answer 24

Acceleration toward the center of a circular path.

Question 25

What is velocity?

Answer 25

Speed in a specific direction.

Question 26

What is speed?

Answer 26

How fast something is moving.

Question 27

What is centripetal force?

Answer 27

A force that keeps objects moving in a circle.

Question 28

What is compression in a wave?

Answer 28

Part where particles are close together in a wave.

Question 29

What is rarefaction in a wave?

Answer 29

Part where particles are spread out in a wave.

Question 30

What is a transverse wave?

Answer 30

Wave where particles move at right angles to wave direction.

Question 31

What is a longitudinal wave?

Answer 31

Wave where particles move parallel to wave direction.

Question 32

What is a crest in a wave?

Answer 32

The highest point of a transverse wave.

Question 33

What is a trough in a wave?

Answer 33

The lowest point of a transverse wave.

Question 34

What is amplitude?

Answer 34

Height of a wave from the rest position; shows energy.

Question 35

What is wavelength?

Answer 35

Distance between two crests or compressions.

Question 36

What is frequency?

Answer 36

How many waves pass in a second.

Question 37

What is intensity in a wave?

Answer 37

Amount of energy in a wave (loudness or brightness).

Question 38

What is pitch?

Answer 38

How high or low a sound seems; based on frequency.

Question 39

What is a decibel?

Answer 39

Unit used to measure sound intensity.

Question 40

What are ultrasonic sounds?

Answer 40

Sounds with frequencies above what humans hear.

Question 41

What is the electromagnetic spectrum?

Answer 41

All types of electromagnetic waves, like radio and X-rays.

Question 42

What is visible light?

Answer 42

The part of the spectrum humans can see.

Question 43

What is invisible light?

Answer 43

Electromagnetic waves we can’t see (e.g. infrared, UV).

Question 44

What is a light year?

Answer 44

Distance light travels in one year.