Marie plans to use tap water, bottled water, and rainwater in an experiment. She wants to see whether plants grow differently when given different types of water. How should Marie organize her daily observations?

Eleanor watered three sets of pea plants at different times. She recorded the average height of each set of plants and entered it into the chart below. Which statement best describes the pattern shown in the chart?

Andrew decided to investigate the growth of rye grass seed for his science fair project. He planted half the seeds in sand and the other half in soil. The seeds began to grow. What should Andrew do next?

Scientists want to determine whether watching television affects a child’s ability to learn to read. The experimental group watches television for 2 hours a day. What should the control group do?

Oswald conducted an experiment to determine whether Laurel Oak trees would grow in very cold weather. Which of his observations is scientifically testable?

A scientist conducted an experiment to determine whether dogs will have poor health if they are given food that is rich in sugar. Which of his observations is scientifically testable?

Jeb observed how a species of dragonfly laid eggs. Which of his observations is a personal opinion?

Kristine observed that a Cypress tree in her backyard produced knobby woody structures called "knees." She wanted to find out how the tree used its knees. She wrote a few notes on the knees to show her teacher. Which of her notes is a personal opinion?

Ricardo came up with three different designs for paper airplanes. He would like to find out which design flies the farthest. Ricardo plans to fly each paper airplane five times. What step should Ricardo take after he flies each plane?

During an investigation about various brands of popcorn, Jay examined his data listed below: Jay had concerns about the data for Brand Y. What should he do

Lillian performed an experiment to find out how exercise affected the heart rates of her classmates.

Her data showed that the boys' heart rates increased an average of 30 beats per minute, and the

girls' heart rates increased an average of 33 beats per minute after running one mile. Cameron is in a

different class than Lillian. He decided to perform the same experiment as Lillian. His data showed

that the boys' heart rates increased an average of 100 beats per minute after running one mile. Which

of the following should Cameron do first?

Eleanor wants to find out the effects of salt water on plants. She conducts an experiment by watering one plant with fresh water and one plant with salt water. She records her observations about each plant for two weeks. Then, she repeats the experiment. Why did Eleanor repeat the experiment?

Eli measured how the temperature of ice water changed over time. What would be the best way for him to check his results?

Which of the following is part of the scientific process?

Mark is splitting a jar of peanuts with his sister. He wants to make sure he splits it evenly. He has put some of the peanuts on the right side of a balance and the rest on the left side, as pictured below. What does Mark need to do to make sure he and his sister get the same amount of peanuts?

Molly has two oranges. Which tool could she use to find out which orange has a greater mass?

Terrell has a piece of granite that he dug out of his yard. He put it on a balance with some standard weights as shown below. How much does Terrell's rock weigh?

Gigi has a 100-gram sample of water in a sealed 1-liter container. She observes that when the water is moved to a different container, it keeps the same shape. Which of the following best describes the sample of water in its current state?

An unknown substance is contained in a sealed cube-shaped box. While inside the box, the substance is cube-shaped as well. The substance is then transferred to a sealed cylindrical container. While inside the container, the substance remains cubeshaped. Which state of matter could the substance be?

Some substances can dissolve in water; some substances cannot. Which of the following objects will dissolve in water?

Sugar cubes are being dissolved in a beaker of water. The sugar will dissolve faster if which of the following changes is made?

Hayden added salt to a glass of water. After 10 minutes, the salt was completely dissolved. The time to dissolve may be shortened to 5 minutes by making which of the following changes?

Renee and Michael are discussing speeding up the dissolving time of salt in a glass of water. Renee says she can stir the water to make the salt dissolve faster. Michael says he can increase the temperature of the water to make the salt dissolve faster. Whose solution to dissolving the salt faster is correct?

Which of the following methods will not decrease the dissolving time of sugar granules in a glass of water?

Justin accidentally spilled a sugary sports drink on his coin collection. After he dried the coins, they were covered in a sticky layer of sugar. Justin tried to separate the sugar from the coins by soaking the coins in cold water. How could Justin remove the sugar from the coins faster?

Ming wants to dissolve 10 grams of salt in water. Which of the following will make the salt dissolve fastest?

Jordan adds 20 grams (g) of salt and 200 g of dry beans to a pot of warm water. He stirs the salt and beans into the water and then lets it sit for 15 minutes. What should Jordan expect to observe after those 15 minutes?

Which set of procedures would be best to follow when separating a mixture of sand, salt, and water?

Miss Lu's class is doing a science experiment with five different substances. Lenny and Crystal were lab partners. They produced a chart based on their results. Use the chart below to answer the questions that follow

Which combination of substances from the chart above would dissolve in water?

When water is heated to 100°Celsius, it begins to boil. Some of the water begins to escape as water vapor. Which best describes what has happened to the water?

Arturo has heated equal amounts of water to four different temperatures as shown below. He puts all four beakers into the freezer. Which beaker will be the first to freeze completely?

When Bobby and his parents first moved into their house, the brick fireplace was very clean. Now that they have built a few fires in their fireplace, the inside is covered with black powder. Bobby's mother tells him that this powder is called soot. Which of the following best explains how the soot came to be in the fireplace?

Which action changes a liquid into a solid form?

Debbie is learning about weather. She wonders how temperature affects the rate of evaporation. She conducts an experiment to find out by placing equal amounts of water in identical dishes. She places one dish near a sunny window and the other on a table in a windowless, air-conditioned room. In three days, she returns to check the dishes. What will she find?

Which term best describes a push or pull that moves an object?

Josie is pushing a large box across the floor. What is the primary force that makes the box difficult to push?

A book is placed on a ramp and it slides down. A brick is place on the same ramp and it does not slide down. What is the most likely reason that the brick does NOT slide down the ramp?

Todd and Angela are racing their toy cars. They set up a ramp and released cars at the top of the ramp. Which of the following tools can Todd and Angela use to measure how far each car travels?

At the circus, an acrobat stood on one end of a seesaw, also called a lever. A heavy weight was dropped onto the other end and the acrobat flew high into the air. What force was used to operate the lever?