Download Name: KEY Class Period: GTT (7th) – SCIENCE OF TECHNOLOGY

Name:
KEY
Class Period:
GTT (7th) – SCIENCE OF TECHNOLOGY FINAL
EXAM REVIEW
1. Define a chemical reaction:
A chemical change where one or more substances are changed into new substances.
2. Define a compound:
Substances made up of two or more elements such as water (H20), and carbon dioxide (CO2).
3. Define an adhesive:
Any man made product that is used to join materials together; sticky
4. Define Environmental Engineering:
A branch of engineering dealing with the treatment of waste, and purification of water and air
5. Define Petroleum Engineering:
A branch of engineering dealing with the drilling for and production of oil, and gas.
6. What is Chemistry?
A branch of science concerned with the properties and interactions of substances.
7. What are the parts of an atom and how do you define them?
Protons – positively charged particles in the nucleus
Neutrons – atomic particles with no charge in the nucleus
Electrons – negatively charged particles orbiting the nucleus
8. Define the parts of a circle (radius, diameter, circumference, area).
Radius – the distance from the center of a circle to the edge
Diameter – the distance across a circle through the center
Circumference – the distance around the perimeter of a circle
9. What are the six different simple machines and the classes of simple machines (ex. Different
classes of levers, pulleys, etc). What are examples of each?
SIMPLE MACHINE
EXAMPLES
Screw
Screw, Spiral slide
Wedge
Knife, Ax, Door Jam
Inclined Plane
Ramp
Wheel & Axle
Car wheels, bike wheels
First Class Lever
See Saw, Scissors
Second Class Lever
Wheel Barrel, Nut cracker
Third Class Lever
Tweezers
Fixed Pulley
Blinds on a window, water well
Movable Pulley
Pulley moves
Block and Tackle
Both fixed and movable
10. Define a compound machine.
Two or more simple machines working together
11. What are the different types of energy (Kinetic, Gravitational Potential, Elastic Potential)?
How do you calculate them? Where are they at their highest? Lowest?
Kinetic Energy – energy of a moving object. At its highest when an object is traveling faster,
and at it’s lowest when an object is stopped.
1
Formula: 𝐾𝐸 = 2 × 𝑚 × 𝑣 2
Potential Energy – stored energy due to an object’s position or condition
Gravitational Potential Energy - stored energy due to gravity. At its highest when the
object’s height is at its highest. At its lowest when the object is on the ground.
Formula: 𝑃𝐸 = 𝑚 × 𝑔 × ℎ (g = 10)
Elastic Potential Energy – stored energy due to the material
12. How do you calculate velocity?
Velocity = the distance an object travels divided by the time it takes to travel
𝑣=
𝑑
𝑡
13. Define Work.
Work is defined as the result of a force moving an object a distance
14. STEM stands for:
Science Technology Engineering Mathematics
15. What did salt do in our ice cream experiment?
Salt lowered the freezing point of water and made the ice colder than normal ice in order to
freeze our ingredients
16. What did detergent do in our oil spill cleanup project?
Detergents made the oil clump into smaller clumps in order to make it easier to clean up.
17. What does the law of conservation of energy state?
Energy cannot be created or destroyed, it can only change forms.
18. List as many careers that use nanotechnology that you can think of.
Military, Space programs, food, clothing, health, etc.