Scientific Skills
Question: What is the term for an educated guess or prediction based on observations of what you think will happen in an experiment?
Answer: What is a hypothesis?
Define energy
Energy is the ability to do work.
Define energy transfer. Use the definition that would apply when you turn on a light bulb.
An energy transfer is the movement of energy from one place to another place.
Question: On a distance/time graph, a straight, diagonal line shows an object moving at a constant speed.
What does a flat, horizontal line on the same graph indicate about the object’s motion?
Answer: What is the object is at rest (not moving)?
Question: This term describes how high or low a sound is, and depends on the frequency of the waves.
Answer: What is pitch?
Question: Which scientific skill involves using your senses to gather information about the natural world and is described using numbers or amounts?
Answer: What is a quantitative observation?
As Felix rides his bicycle down the hill, what is happening?
(a) kinetic energy changing to potential energy
(b) electrical energy changing to kinetic energy
(c) potential energy changing to kinetic energy
(d) kinetic energy changing to electrical energy?
(c) potential energy is changing to kinetic energy
When you rub your hands together, what type of energy do you start with, and what type of energy do you finish with?
What is mechanical (kinetic) energy will change into thermal (heat) energy
Two Parts:
What is speed?
What is the equation for calculating speed?
Speed is the measurement of how fast an object's position changed in a given amount of time.
The equation for calculating speed is Speed = Distance/Time
This part of the ear vibrates when sound waves hit it, starting the hearing process.
Answer: What is the eardrum?
Question: When graphing experimental results, which variable is placed on the x-axis?
Answer: What is the independent variable?
Define potential energy.
Potential energy is stored energy.
Tell me what types of energy were transferred when someone uses a lamp? Describe the energy transfer that takes place (at least 2).
The electrical energy from the plug is converted to light energy and also heat energy.
Question: Two people are trying to move a refrigerator. One person is pushing to the right with a force of 25 Newtons and the other is pulling on the right side with a force of 15 Newtons.
What is the overall net force and direction of the refrigerator movement?
Answer: What is 40 Newtons and to the right?
Part 1: Sound travels fastest through this type of medium. Part 2: Explain how it works.
Answer: What is a solid? Vibrations travel as energy through each of the molecules that are tightly packed together.
Question: In the hypothesis, "If plants are given more sunlight, then they will grow taller," what is the dependent variable?
Answer: What is the height of the plants?
What is kinetic energy and where in a roller coaster ride is kinetic energy at it's peak?
Kinetic energy is the energy that an object has due to its motion. Kinetic energy in a roller coaster is at its highest at the bottom of a tall hill!
What are the energy transformations that happen when you use a Newton's cradle?
Gravitational potential energy transfers into kinetic energy and back again. Energy is also lost as sound energy (the balls clinking) and heat energy (friction from this).
Question: According to Newton's 1st Law of Motion, what property of an object resists changes to its state of motion?
Answer: What is inertia?
This happens to a sound wave when it bends around a corner or spreads out after passing through an opening, allowing you to hear someone talking even if you can’t see them.
Answer: What is diffraction?
After observing a plant growing faster in sunlight than in shade, write a scientific claim about how light affects plant growth.
Answer: What is "Plants grow faster with more sunlight." or "More sunlight will help a plant grow faster or better." (answers may vary)
Complete this quote from Albert Einstein
"Energy cannot be created or _________ . It can only be ________ from one form to another."
Energy cannot be created or destroyed. It can only be changed from one form to another.
During a collision of two cars hitting each other, name at least 2 forms of energy that are present and transform into each other.
what is sound energy
kinetic/mechanical energy
thermal/heat energy
Question: If a car slows down FROM 25 m/s TO 15 m/s in 4 total seconds. What is his acceleration? (hint: use the acceleration formula)
Answer: What is -2.5 m/s/s (or m/s2)
Question: When two sound waves meet and create a louder sound in some spots and a softer sound in others, this type of wave interaction is happening.
What is interference (constructive and destructive)?