Water Works
Sink or Think
Matter in Motion
Analyze the Visuals
Test It to Trust It
Energize This!
Out of This World
Picture This!
100
What provides the energy that drives the water cycle?
The Sun
100
What property compares mass to volume?
Density
100
What happens to particles when the temperature increases?
They move faster.
100
While Mei was working in her garden, she made several different conclusions.
Mei wants to test one of her conclusions. Which conclusion could be tested with a scientific experiment?
3
100
What makes a scientific question testable?
It can be investigated through experiments.
100
What energy transformation happens in a lightbulb?
Electrical to light and heat
100
What causes day and night on Earth?
Earth’s rotation
100
Donna is learning about the water cycle in school. She knows that runoff is water that flows over land surfaces.
Which of the following happens just before the runoff in the picture above?
precipitation
200
What process changes liquid water into water vapor?
Evaporation
200
Why does a less dense object float in water?
It has less mass per volume than water.
200
Heating a liquid can cause it to change into which state?
Gas
200
Based on the diagram, what energy transformation occurs in both Test 1 and Test 2?
Electrical energy is transformed into light energy and heat energy.
200
Why should measurements be taken more than once?
To improve accuracy and reliability.
200
Why does a lightbulb give off heat as well as light?
Not all energy changes into light.
200
Why does the Sun appear brighter than other stars?
It is closer to Earth.
200
Why does bubbling during an experiment show a chemical change instead of a physical change?
Bubbling shows gas formation, which means a new substance is created.
300
Which process is the reverse of evaporation?
Condensation
300
Why might two floating and sinking experiments have different results?
Different variables were changed.
300
Which evidence shows that a chemical reaction occurred?
Bubbling, gas formation, color change, or heat
300
Luis wants to learn if the direction in which seeds are planted affects the direction in which the roots grow. He plants the seeds as shown below.
Which of the following data would be most important for Luis to record?
The positions of seeds and directions of root growth
300
What is the purpose of a control group?
To compare results and show what changes.
300
What happens to energy as electricity flows through a circuit?
It changes form.
300
What is Earth’s home galaxy?
The Milky Way
300
The picture below shows a rocky cliff. Every few years, a section of the cliff collapses.
What type of erosion would most likely cause the collapse?
waves pounding the base of the cliff
400
Why does water change from a liquid to a gas on a hot day?
Heat increases particle motion.
400
Name one variable that could affect floating and sinking.
Size, shape, material, or mass
400
Why is bubbling often a sign of a chemical reaction?
Gas is being produced.
400
Latisha bought three different brands of cat food. She placed an equal amount of cat food in three equal-sized bowls. She placed a different brand of cat food on the floor each day, over a three-day period. Each day, Latisha’s cat eats a different brand of food.
Latisha observes her cat eating the food. Which of the following is an observation that would provide evidence for a conclusion?
The cat ate more of Brand C than of Brand A or Brand B.
400
Why is observational evidence important?
It provides information about what happens.
400
How can sound energy cause a table to rattle?
Vibrations transfer energy.
400
How does gravity keep Earth in orbit around the Sun?
It pulls Earth toward the Sun.
400
Joe lives near a mountain range. He sees that cumulonimbus clouds have been building throughout the day and the temperature has dropped from 14°C (57°F) to 6°C (42°F), as shown below.
Which weather is most likely to occur?
a rainstorm
500
Give one everyday example of water changing state.
Ice melting, puddles evaporating, water boiling
500
Why must variables be controlled in an experiment?
To make it a fair test.
500
Is separating a mixture a physical or chemical change?
Physical change
500
Jackson creates a model to describe the water cycle. His model has the following parts: a clear plastic box with a tight-fitting lid, water, soil, a plant, ice cubes, and a heat lamp.
Which of the following best describes the function of the heat lamp in the model?
The lamp provides heat energy that causes evaporation.
500
Why must another group repeat an experiment?
To confirm the results.
500
Name one energy transformation from everyday life.
Electrical to sound, chemical to heat, etc.
500
How does distance from the Sun affect planets?
It affects temperature and conditions.
500
Andy completed an experiment to test if seeds germinate faster at higher temperatures. Andy got three damp paper towels and rolled up 10 radish seeds in each one. He placed one group of seeds in the refrigerator. He placed a second group on the kitchen countertop, and he placed a third group in a warm spot on top of his hot water heater. Andy found the average time it took the seeds to germinate in each location. The results are shown in the table below.
Andy concluded that radish seeds germinate faster at higher temperatures. Which of the following statements best supports Andy’s conclusion?
The seeds took an average of 3 days to germinate on the water heater and 12 days in the refrigerator.