Matter
How many nitrogen atoms and hydrogen atoms does NH3 have?
One nitrogen atom and three hydrogen atoms.
Explain how a magnet attracts or repels other magnets.
Like poles of magnets repel each other, and opposites poles attract.
Explain Newton's 1st Law of Motion.
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.
What is potential energy and give an example.
Potential energy is stored energy. Examples may vary.
How do molecules differ from atoms? Explain or Draw
Atoms are the basic building blocks of matter and are one element. Molecules are two or more atoms bonded together.
What is the difference between synthetic and natural materials?
Synthetic materials are man-made in factories. Natural materials are sourced from nature.
What is a balanced force?
No net force and no change in motion.
What is friction?
What is kinetic energy and give an example of an object exhibiting kinetic energy.
Kinetic energy is the energy in motion. Examples may vary.
Why do we see bubbles when we mix baking soda and vinegar?
Bubbles are caused by a chemical reaction creating carbon dioxide gas, which makes the bubbles.
How does the arrangement of particles differ between solids, liquids, and gases? Draw on whiteboard.
What is an unbalanced force?
A net force and a change in motion.
Describe an example where friction plays a role in motion.
Answers may vary. A car's tires on the road, which helps the car stop.
All objects above ground have gravitational potential energy. TRUE or FALSE?
True.
How does potential and kinetic energy apply to a roller coaster ride?
Potential energy at the top is converted into kinetic energy as the coaster moves down.
What is density and how is it calculated?
Density measures how closely packed together a substance's particles are. D=M/V
As an object's mass increases, what happens to it's gravitational pull?
Its gravitational pull will also increase.
What is Newton's 3rd Law of Motion?
Every action has an equal and opposite reaction.
If an object is dropped from a height, how does its potential and kinetic energy change as it falls?
Explain Newton's 2nd Law of Motion.
The greater the mass of an object, the greater the force needed to move an accelerate that object.
F=M x A
What is a chemical reaction? List two signs of a chemical reaction.
When atoms in a substance break their bonds and rearrange to form a new substance. Bubbles, color, odor, temperature.
What is a force?
A push or pull that cause an object to move, stop, or change direction.
Explain how a rocket launching into space demonstrates Newton's 3rd Law.
Give an example of a thermal energy conductor and insulator. Explain
Conductor: metal, speeds up heat transfer
Insulator: plastic, slows down heat transfer
You add ice to a warm drink. How will thermal energy transfer?
Thermal energy from the warm drink will transfer to the ice. Heat always moves from warmer objects to cooler objects.