Question

name: first
circle block 2 3 5

1. a group tests if the amount of fertilizer changes the number of flowers produced by tomato plants.

what is the dependent variable? (sci.sep3.a.m)
a) the amount of fertilizer given
b) the type of soil used
c) the number of flowers produced
d) the size of the pots

1. a student wants to see if different colors of light affect the speed of seed germination.

which is the independent variable? (sci.sep3.a.m)
a) the color of light
b) the number of seeds germinated
c) the type of plant seed
d) the amount of water

1. if a student changes the brand of batteries in a flashlight to test how long the flashlight will shine, what is the dependent variable? (sci.sep3.a.m)

a) the brightness of the flashlight
b) the type of flashlight
c) the battery brand
d) how long the flashlight stays lit

1. a teacher experiments with how the ramp’s steepness affects the speed of a toy car.

what is one controlled variable? (sci.sep3.a.m)
a) the speed of the car
b) the angle of the ramp
c) the weight of the toy car
d) how the car is released

1. which of the following questions best follows the scientific inquiry process? (sci.sep1.a.m)

a) what is the prettiest color of flower?
b) does the amount of water affect the growth rate of beans?
c) why does chocolate taste good?
d) what is the most popular sport?

1. a student wants to test if the temperature of water affects how fast sugar dissolves.

what is the independent variable? (sci.sep1.a.m)
a) the speed at which the sugar dissolves
b) the amount of sugar used
c) the type of water container
d) the temperature of the water

Explanation:

Question 4

In an experiment, the dependent variable is what is being measured or observed and depends on the independent variable. Here, the experiment tests if fertilizer amount (independent) changes flower number. So the number of flowers produced is dependent on fertilizer amount.

The independent variable is the one manipulated by the experimenter. The student is testing how different light colors (manipulated) affect seed germination speed. So light color is the independent variable.

The dependent variable is what's measured (depends on independent variable). The student changes battery brand (independent) to test how long the flashlight shines. So how long the flashlight stays lit is dependent on battery brand.

Answer:

c) The number of flowers produced

Question 5