Week+25

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Monday
Jaylen wanted to see if circumference and mass affects the speed at which a hula hoop spins around. He three hula-hoops of different size and mass. He recorded his data in the chart below.

Based on his data, what is the best explanation for Jaylen to conclude?
 * Number of Spins in One Minute: **
 * ~ Hoop Size ||~ 2kg ||~ 4gk ||~ 6kg ||
 * = Trial 1 ||= 36 ||= 30 ||= 22 ||
 * = Trial 2 ||= 39 ||= 28 ||= 24 ||
 * = Trial 3 ||= 37 ||= 29 ||= 25 ||

A.) The hula-hoop with less mass was more fun to play with. B.) The greater the mass of the hoop, the greater the the speed. C.) The hula-hoop with more mass was more difficult to control. D.) The middle mass hula-hoop was just right for hula-hooping

Darrin wanted to see if the air pressure inside of a basket ball affected the height of its bounce. He inflated three basket balls at different air pressures and dropped each of them off of a ladder. As each ball hit the ground and bounced up, he measured the highest spot of each bounce. His data is shown below.
 * Your** Turn to SRE:
 * =  ||||= **Basket Ball Bounce** ||=   ||
 * = **Pressure**
 * in PSI** ||= Ball 1

8 psi ||= Ball 2

10 psi ||= Ball 3

12 psi || Based on his data, what is the best explanation for him to conclude?
 * = **Bounce**
 * Height**
 * in inches** ||= 38 in ||= 42 in ||= 46 in ||

A.) As more air is added to the ball, the ball bounces higher due to greater potential energy stored by the air. B.) As the air pressure inside the ball increases, the higher the ball bounces. C.) There is not enough data to make a conclusion. More trials are required. D.) The amount of air inside of the basket ball has very little effect on the height of the ball's bounce.

**Tuesday**

 * My** turn to SRE:

Some people have a photographic memory and can memorize anything they see almost instantly! Wouldn't that make homework easy? Other people can remember almost anything they hear.

What would be the best type of scientific investigation to figure out which kind of memory you have?

A.) Design a experiment where the number of things a person must remember changes each time and the person must tell how many they remember. B.) Create a test where people have to memorize a list of 7 objects they see and a list of 7 objects they hear to see how many they remember from each list. C.) Have people tell a story about an event that happened three years ago. D.) Show people two similar pictures and have them describe how they are different after you cover them up.


 * Your** Turn to SRE:

Four students are organizing data they collected during their investigations. The table below shows what each students is creating. Which student is analyzing the results of an experiment? 1.) DeMia 2.) Justin 3.) Kevin 4.) Laura
 * **Student** || ** Activity ** ||
 * DeMia || Creates a venn diagram to show how flowering and non-flowering plants compare and contrast. ||
 * Justin || Creates a graph to show how tall plants with fertilizer and plants without fertilizer grew. ||
 * Kevin || Builds a model to show how the roots of a plant absorb water from the soil. ||
 * Laura || Draws a poster to explain how leaves convert water and CO2 into food during photosynthesis. ||

Wednesday My Turn to SRE:

Which answer choice correctly lists environments from most dry to least dry?

A. desert, tundra, grassland, rainforest B. desert, grassland, rainforest, tundra C. desert, rainforest, grassland, tundra D. rainforest, grassland, tundra, desert

Your Turn to SRE: Deserts in the temperate zones can be extremely hot in the afternoon and below freezing at night. Which answer best explains why this happens?

A. Temperate deserts are found at high elevations, where the Sun and the wind are much stronger. This creates more extreme temperature changes. B. Temperate deserts lack trees and grass. With no trees, the Sun shines directly down and causes it to get hot in the day, and with no grass, the heat escapes at night. C. Temperate deserts have very little cloud cover and no humidity. This means that more energy from the Sun reaches the desert in the day, but that heat can escape quickly at night. D. Temperate deserts have higher rainfall than other kinds of deserts. Warm rain during the day produces warm breezes in the desert. Cooler rains at night draw warm air away from the desert.

Thursday

Friday My Turn to SRE: Which of the following could scientists do to determine whether the alligator population in the Everglades is increasing or decreasing?


 * 1) watch for alligators for a week as they travel around the Everglades and compare it to last year’s data
 * 2) look in the newspaper for articles about alligator attacks
 * 3) observe and record the number of alligators they see in the Everglades for several months and compare it to last year’s data
 * 4) estimate the answer from the number of alligators they counted last year

Your Turn to SRE: A scientist discovered a new species of animal. She wants to find out what this animal eats. <span style="font-family: 'Times New Roman',serif; font-size: 14pt;">Which of the following would be the BEST way for the scientist to get the information she needs?


 * 1) <span style="font-family: 'Times New Roman',serif; font-size: 14pt;">capture several animals and try to feed them different foods
 * 2) <span style="font-family: 'Times New Roman',serif; font-size: 14pt;">predict that it will eat the same foods as other animals in its habitat
 * 3) <span style="font-family: 'Times New Roman',serif; font-size: 14pt;">put plants and meat near its home and see which it chooses
 * 4) <span style="font-family: 'Times New Roman',serif; font-size: 14pt;">observe the animal eating in its natural habitat