Show:
Scientific Method
Motion
Forces
Work & Machines
6th/7th Grade Stuff
100
This is an educated guess about the answer to your testable question.
What is a hypothesis?
100
A snowboarder completes a 100-meter course in 20 seconds. What is her average speed?
5 m/s (total distance divided by total time)
100
This is the unit for forces.
What is a Newton?
100
This is the formula for work.
What is work = force x distance?
100
A human being with two X chromosomes will be what: male or female?
What is a female?
200
What is the name for the step-by-step instructions for performing an experiment?
Procedure
200
How do you calculate speed if you know distance and time?
Speed = distance / time
200
This is a tool we can use to measure forces.
What is a springscale?
200
Moises lifts a very heavy (300 N) television up 1.25 meters. How much work has he done? (Include correct units)
What is 375 J?
200
This is the process of cell's dividing to create new identical cells.
What is mitosis?
300
An eighth grade class did an experiment to determine if soda would affect the growth of Christmas trees. In the experiment, what is the dependent variable?
What is growth of Christmas trees?
300
When I'm standing still, I'm not moving if the earth is my reference point. What could I pick as a reference point to say I was moving?
What is the sun?
300
When finding net force on an object, you do this (add, subtract, multiply, divide) to forces acting in the SAME direction.
What is add?
300
How do most simple machines make work easier? 1) Decreasing the amount of force you have to apply, and decreasing the distance you have to apply it 2) Decreasing the amount of force you have to apply, but increasing the distance you have to apply it 3) Increasing the amount of force you have to apply, and increasing the amount of distance you apply it
What is 2) decreasing force, increasing distance?
300
This is what happens when the sun, moon, and earth are in the positions on the board: 1) Solar eclipse 2) Lunar eclipse 3) Full moon
What is a lunar eclipse? (moon blocks out the sun)
400
If you conduct the same experiment twice and received two very different results, what should you do?
Do more trials.
400
Change in distance divided by change in time = speed. What is change in speed divided by change in time?
Acceleration
400
An object that has a non-zero net force acting on it will do what?
Accelerate / change its motion
400
You want to make the lever with a high mechanical advantage. How do the effort arm and the resistance arm compare? 1) The effort arm is the same size as the resistance arm 2) The effort arm is much shorter than the resistance arm 3) The effort arm is much longer than the resistance arm
What is 3) the effort arm is much longer than the resistance arm?
400
A father is heterozygous for brown eyes (Bb) and a mother has blue eyes (bb). What are the chances that their child will have blue eyes?
1/4 or 25%
500
Name one error in the following experiment: Marcus is testing how different kinds of baseball bats affect how
Amount of soil and amount of water needed to be the same
500
My speed increases from 30 m/s to 70 m/s over the course of 8 seconds. What is my acceleration?
What is 5 m/s/s?
500
What are Newton's three laws?
1) Inertia: an object at rest stays at rest & an object in motion stays in motion unless acted on by an unbalanced force 2) Force = mass x acceleration 3) Every action has an equal and opposite reaction
500
The mechanical advantage of an inclined plane with a length of 30 m and a height of 3 m is 10. If you use this plane to lift a 500-N object, how much force do you have to apply?
What is 50 N?
500
Why does the earth experience seasons? 1) Its location compared to the sun changes throughout the year 2) The earth is tilted on its axis 3) The earth's atmosphere goes through cycles of global warming and global cooling
2) The earth is tilted on its axis.