Extra Bell Ringer Questions- Study Island

Elliot wants to compare the density of four objects to the density of water. Elliot knows that if an object sinks in water, it has a higher density than water and that if an object floats in water, it has a lower density than water. Which of the following is a scientific investigation that Elliot could conduct to test the densities of the objects?

• Elliot could put the four objects in water to see if they sink or float.
• Elliot could ask his teacher which object has the greatest density.
• Elliot could look up the densities of the objects in a textbook.
• Elliot could put the objects in water to see how much water they absorb.

Keith hypothesizes that if he plants a rose bush in the sun, it will grow twice as fast as a rose bush planted in the shade. Keith makes the following plan for his experiment: What is wrong with this experimental design?

• He should not use rose bushes that are the same age.
• There is more than one variable.
• He should measure the plants growth more often.
• There is nothing wrong with the design.

Which of the following activities are part of scientific investigations?

• communicating
• observing
• comparing and contrasting
• all of these

Janice wants to grow flowers in her backyard. She has four types of dirt that she could use, but she is unsure of which type would allow the flowers to grow the best. In order to figure this out, she sets up an investigation. Janice puts each type of soil in a different pot and plants a flower in each pot. What scientific question should Janice ask from her experiment?

• Which soil looks the best?
• Which soil type is preferred by most people?
• Which soil type allows the flower to grow the most?
• Which soil is the oldest?

Deedee has recently finished learning about ecosystems of the African plains in her science class. She has since built a model in which a plant is tied by a string to a toy giraffe, and the toy giraffe is tied to a toy lion. What is this model most likely meant to represent?

• extinction
• a food chain
• organ systems
• parts of a cell

George designed an experiment to determine the number of calories consumed daily in the average American diet. The procedure he used for his experiment is shown below. 1. Find 100 volunteers to record everything they eat for a week 2. Ask volunteers what their favorite dessert is 3. Collect volunteers' records 4. For each volunteer, calculate the total number of calories taken in during the week 5. Divide each volunteer's total calorie count by seven and then average the 100 participants' daily calorie consumption Which step in George's experimental procedure is unnecessary?

• step 2
• step 3
• step 1
• step 4

Which of the following statements is a valid hypothesis?

• Talc is softer than quartz.
• A cat purrs when it is happy.
• Ghosts do not exist.
• What causes the tides?

Evan decides to test his prediction that seeds grow better in the dark. He has gathered seeds and put them on damp paper towels. Which of the following would be the best way for Evan to test his prediction?

• put one paper towel with seeds in a cold closet and another in a warm closet
• put one paper towel with seeds in a sunny place and one in a dark closet
• put one paper towel with seeds in a sunny window
• put one paper towel with seeds in a cold, dark closet

Nicole is doing a science project. Her hypothesis is below. The plants in the sun will sprout before the plants in the closet. Which question did she most likely ask to begin her project?

• What kinds of seeds sprout the fastest?
• Which kind of soil helps seeds sprout the fastest?
• What is the effect of sunlight on how long it takes seeds to sprout?
• What is the effect of water on how long it takes seeds to sprout?

Linda is curious about how snowflakes form. Which of the following sentences is the best hypothesis for Linda to test?

• Snowflakes are different from rain and sleet.
• Why do snowflakes form?
• Something causes snowflakes to form inside a cloud.
• Snowflakes form when water freezes slowly.