What is the dependent variable (effect) is this experiment?

"Does eating breakfast improve test score?"

What is the independent variable (cause) is this experiment?

"Which type of medium (soil or sand) is best for plant growth?"

What is the dependent variable (effect) in this experiment?

"Do tall people jump further than short people?"

Janet wants to see whether drinking coffee will improve productivity (productivity is how much work you get done). What is the independent variable in this experiment (cause)?

A factor or condition that is kept the same is called the

When writing you hypothesis, what information follows IF?

When writing a hypothesis, what information do you fill in after THEN?

Juan wanted to find out whether the concentration of salt in water affected how long it takes water to cool. He put 4 identical plastic glasses, each of which contained 225 mL of a different concentration of salt solution, into a freezer. The different salt concentrations were 0 percent, 10 percent, 20 percent, and 30 percent. He recorded the amount of time it took for each solution to cool to a temperature of 3 degrees Celsius.

What is the independent variable?

Juan wanted to find out whether the concentration of salt in water affected how long it takes water to cool. He put 4 identical plastic glasses, each of which contained 225 mL of a different concentration of salt solution, into a freezer. The different salt concentrations were 0 percent, 10 percent, 20 percent, and 30 percent. He recorded the amount of time it took for each solution to cool to a temperature of 3 degrees Celsius.

What is the dependent variable?

Juan wanted to find out whether the concentration of salt in water affected how long it takes water to cool. He put 4 identical plastic glasses, each of which contained 225 mL of a different concentration of salt solution, into a freezer. The different salt concentrations were 0 percent, 10 percent, 20 percent, and 30 percent. He recorded the amount of time it took for each solution to cool to a temperature of 3 degrees Celsius.

What are the constants? (can be more than one)

Juan wanted to find out whether the concentration of salt in water affected how long it takes water to cool. He put 4 identical plastic glasses, each of which contained 225 mL of a different concentration of salt solution, into a freezer. The different salt concentrations were 0 percent, 10 percent, 20 percent, and 30 percent. He recorded the amount of time it took for each solution to cool to a temperature of 3 degrees Celsius.

Which glass is the control group?

Juan wanted to find out whether the concentration of salt in water affected how long it takes water to cool. He put 4 identical plastic glasses, each of which contained 225 mL of a different concentration of salt solution, into a freezer. The different salt concentrations were 0 percent, 10 percent, 20 percent, and 30 percent. He recorded the amount of time it took for each solution to cool to a temperature of 3 degrees Celsius.

Which glass(es) is the experimental group(s)?

Susan wanted to know how the amount of water affected the rate of seed germination. She read that 150 mL of water was the ideal amount of water for seed germination of up to 10 seeds in 500g of soil. She got 5 identical flower pots and placed 500g of potting soil in each. She then planted 10 seeds of the same type in each pot. She placed the pots in the same location so that each received the same amount of light. The pots were given the following amounts of distilled water each day for 40 days:

Pot 1 50 mL

Pot 2 100 mL

Pot 3 150 mL

Pot 4 200 mL

Pot 5 250 mL

Each day she recorded the number of seeds that germinated and the height of each plant.

What is the independent variable?

Susan wanted to know how the amount of water affected the rate of seed germination. She read that 150 mL of water was the ideal amount of water for seed germination of up to 10 seeds in 500g of soil. She got 5 identical flower pots and placed 500g of potting soil in each. She then planted 10 seeds of the same type in each pot. She placed the pots in the same location so that each received the same amount of light. The pots were given the following amounts of distilled water each day for 40 days:

Pot 1 50 mL

Pot 2 100 mL

Pot 3 150 mL

Pot 4 200 mL

Pot 5 250 mL

Each day she recorded the number of seeds that germinated and the height of each plant.

What is the dependent variable?

Susan wanted to know how the amount of water affected the rate of seed germination. She read that 150 mL of water was the ideal amount of water for seed germination of up to 10 seeds in 500g of soil. She got 5 identical flower pots and placed 500g of potting soil in each. She then planted 10 seeds of the same type in each pot. She placed the pots in the same location so that each received the same amount of light. The pots were given the following amounts of distilled water each day for 40 days:

Pot 1 50 mL

Pot 2 100 mL

Pot 3 150 mL

Pot 4 200 mL

Pot 5 250 mL

Each day she recorded the number of seeds that germinated and the height of each plant.

What are the constants?