Show:
Physics & Chemistry
Technology
The Physical World
Energy, Matter and Change
Atoms and Molecules
100
Define "force."
A force is a push or a pull
100
Define “technology.”
Technology is the application of science to solve problems or accomplish useful tasks.
100
DEFINE “energy”.
Energy is the ability to change or to cause change.
100
LIST as many forms of energy as you can.
thermal (heat), chemical, electrical, light, pressure, kinetic (movement), nuclear
100
Why is it important to know about atoms?
It is important to know about atoms because atoms explain all the properties of matter.
200
Which has the most mass: a basketball or a bowling ball?
A bowling ball has more mass (there is more matter contained in it).
200
EXPLAIN why a bridge is technology.
A bridge is technology because solves the problem of how to cross a river.
200
LIST the 3 directions of space.
The 3 directions of space are: up-down, right-left, and forward-backward.
200
All the energy used by living things can be traced back to:
the Sun
200
DESCRIBE why a material is a solid.
A material is a solid if its atoms are all stuck together. The material holds its shape and does not flow.
300
DEFINE “matter”.
Matter is everything that has mass and takes up space.
300
How does technology keep getting better?
The design cycle.
300
What are the metric units for measuring mass?
The metric units for measuring mass are kilograms and grams.
300
DESCRIBE: How are forces created?
Actions (for example: by your muscles, Earth’s gravity, movements) and an energy source (for example: food, fuel, the Sun)
300
DESCRIBE why a solid can change into a liquid.
As the temperature goes up, atoms wiggle more, and overcome the attractive forces keeping them together; they are free to move around more.
400
LIST the 3 forms of matter.
The 3 forms of matter are: liquid, solid, and gas.
400
DEFINE “engineering.”
Engineering is a career that uses science to design, create, and work with technology.
400
How many grams are in a kilogram?
There are 1000 grams in a kilogram.
400
What causes temperature change?
The forces and motion of the trillions of tiny atoms inside matter.
400
DEFINE “element."
An element is a pure form of matter that can’t be broken down into other elements - all the atoms in it are the same kind.
500
When gasoline is burned to release energy, that is called a __________
Chemical Reaction
500
EXPLAIN what a mechanical engineer uses to do their job.
A mechanical engineer uses concepts of geometry, force, motion, energy and power to design things.
500
What are the two ways time is used in Science?
1. to identify a particular moment in the past or in the future 2. to measure intervals of time (quantities: how much time).
500
How does one kind of matter change into completely different kinds of matter?
The forces between atoms sometimes cause them to combine with each other to form completely different kinds of matter.
500
What are the 3 atoms in a molecule of water?
hydrogen-oxygen-hydrogen, or two atoms of hydrogen & one atom of oxygen. or H2O