Forces & Motion
This is the overall force acting on an object:
Net Force
What is the highest point of a transverse wave called?
Crest
What subatomic particle has a positive charge?
Proton
What type of change forms a new substance?
Chemical change
What is a test model called?
Prototype
This type of force causes motion or direction to change:
unbalanced force
What type of wave needs a medium to travel through?
mechanical wave
What is the center of an atom called?
Nucleus
Is melting butter a physical or chemical change?
Physical change
IT reduces waste and decreases the need for new raw materials.
recycling
This law by Newton states that objects at rest stay at rest and objects in motion will stay in motion unless acted on by an unbalanced force:
Newton's first law
In which type of wave do particles move parallel to the wave direction?
longitudinal wave
What is the charge of a neutron?
No charge / neutral
Name one sign of a chemical reaction.
Color change, temperature change, gas produced, odor produced, or new substance formed
Put these in order:
Experiment, Observe, Conclude, Hypothesis
Observe → Hypothesis → Experiment → Conclude
A car suddenly stops and the passengers lurch forward. What property explains this?
inertia
What are the crowded areas of a longitudinal wave called?
Compressions
What does pH stand for?
Power of hydrogen
Why is baking a cake considered a chemical change?
New substances form during baking.
Why do engineers use the engineering design process?
To create and improve successful solutions/designs.
Explain the difference between balanced and unbalanced forces.
Balanced forces do not change motion; unbalanced forces cause acceleration or changes in motion
Explain one difference between transverse and longitudinal waves.
Transverse waves move particles up and down;
longitudinal waves move particles back and forth parallel to the wave direction.
If an atom has 10 protons and 12 neutrons, what is its mass number?
22
Explain the difference between a physical and chemical change.
Physical changes alter appearance or state without creating a new substance; chemical changes create new substances.
Explain one benefit of conserving natural resources.
Conserving resources protects supplies for future generations