Body Systems
This process helps an organism maintain stable internal conditions, such as body temperature, even when the outside environment changes.
homeostasis
Legend says this scientist dropped objects from the Leaning Tower of Pisa to show that heavier objects do not fall faster than lighter ones.
galileo
The unit used to measure force.
Newton
At this type of plate boundary, plates move apart and new crust forms.
A student changes the temperature of water to see how fast sugar dissolves. This is the variable being changed.
Independent variable
The upper arm bone injured during a fall on the soccer field.
humerus
A skateboarder starts at 0 m/s and reaches 20 m/s in 5 seconds. What is his acceleration?
4 m/s squared
Maya pushes a bin with 13 N of force for 7 m. The work done is this amount.
91 joules
The Himalayas formed at this type of plate boundary when two continental plates collided.
convergent
In an experiment testing whether music affects plant growth, all plants receive the same amount of water and are the same species. These are examples of this type of variable.
Constants
This flat bone, also known as the breastbone, helps protect the heart and lungs.
sternum
A bus travels for 45 minutes at 48 km/h. The distance traveled is this many kilometers.
36 km
Jordan performs 84 J of work while moving a box 12 m. This force was applied.
7 newtons
A rock containing compacted shells, sand, and visible layers belongs to this rock type.
sedemintary
A student changes the amount of sunlight a plant receives and measures how tall it grows. This is the variable being measured.
What is the largest organ of the human body?
skin
A car speeds up from 10 m/s to 30 m/s in 4 seconds. Its acceleration is this value.
You're stranded on a desert island with only a broom, a bucket, a baseball bat, and a wheelbarrow. You need to move 200 pounds of coconuts across the island. Which of these is a second class lever?
wheelbarrow
Heat and pressure can transform existing rock into this type without melting it.
metamorphic
A student tests whether fertilizer affects plant growth. The plants that receive no fertilizer belong to this group.
control group
What is the largest bone in the human body?
Femur
A skateboarder is standing still at the top of a hill. As she rolls down, one form of energy decreases while another increases.
gravitational potential energy and kinetic energy
Archimedes supposedly said, "Give me a place to stand, and I can move the Earth" while describing this simple machine.
lever
This process at a mid-ocean ridge creates new ocean floor as magma rises and cools.
sea floor spreading
Scientists keep all conditions the same except one so they can determine what causes changes in the results. Why do they do this?
Ensuring only one variable is being tested