Practice Exam Flashcards
(21 cards)
If one variable increases in value while a second, related variable decreases in value, the relationship is said to be
Inverse
A move projector makes a 1 m by 1 m image when projecting 1 m from a screen, a 2 m by 2 m image when projecting 2 m from a screen, and a 3 m by 3 m image when projecting 3 m from the screen. What is the proportional relationship between the distance from the screen and the area of the image?
ANSWER
According to the scientific method, what needs to be done to move beyond conjecture or simple hypothesis in a person’s understanding of his or her physical surroundings?
Conduct a controlled experiment
A candle with a certain weight melts in an oven, and the resulting weight of the wax is
The same
A proportionality constant
ANSWER
An equation describes a relationship where
ANSWER
A 5 km span is the same as how many meters?
5,000 m
A move projector makes a 1 m by 1 m image when projecting 1 m from a screen, a 2 m by 2 m image when projecting 2 m from a screen, and a 3 m by 3 m image when projecting 3 m from the screen. What is the proportional relationship between the distance from the screen and the intensity of the light falling on the screen?
ANSWER
A general statement describing a relationship that is observed in nature to occur consistently time after time is a (an)
ANSWER
A tentative scientific explanation which may or may not be rejected upon further experimentation is called a
Hypothesis
If a cube of jello is cut into two pieces, what total property of the new pieces change?
- mass
- volume
- density
- surface area
Surface area
An event with two situations with all the influencing factors identical except one is a (an)
- hypothetical experiment
- experiment
- controlled experiment
- impossible experiment
Controlled experiment
Which of the following is not a SI unit of the property it measures?
- length - meter
- volume - liter
- time - second
- mass - kilogram
NOT MASS KG, ANSWER
A tentative thought - or experiment - derived explanation is known as a (an)
Hypothesis
The property of volume is a measure of
How much space the object occupies
The English unit of volume is closest in side to a liter is
- gallon
- ounce
- quart
- cup
Quart
From a bridge, a ball is thrown straight up at the same time a ball is thrown straight down with the same initial speed. Neglecting air resistance, which ball will have a greater speed when it hits the ground?
Both balls will have the same speed
A measure of how fast your speed is changing as you travel to campus is a measure of
- velocity
- average speed
- acceleration
- the difference between initial and final speed
ANSWER - NOT AV SPEED
Neglecting air resistance, a ball in free fall near Earth’s surface will have
- constant speed and constant acceleration
- increasing speed and increasing acceleration
- increasing speed and decreasing acceleration
- increasing speed and constant acceleration
ANSWER
If a ball swinging in a circle on a string is moved twice as fast, the force on the string will be
- twice as great
- four times as great
- one-have as much
- one-fourth as much
ANSWER
A quantity of 5 m/s^2 is a measure of
Acceleration
