Warm-ups:

Safety Review and Scientific Method

Monday, August 27, 2012

• No eating or drinking in the lab• Read all directions thoroughly• Be careful in the lab- no messing around• Keep lab area neat• Return all supplies • Do not taste, touch, or smell any substances UNLESS told

to do so• When smelling, wave hand over substance• Tell teacher of all accidents• No binders in the lab• Clean up area- area must be checked by an adult

Pick two of the safety rules and state why they are necessary.

Tuesday, August 28, 2012

• Read the following lab scenario. Describe what is dangerous in the scenario and what the students should have have done to be safe.

As usual, Stephen and Janet were late to class and all the other students were already in the lab. “What are we

supposed to do?’’ asked Janet. “I don’t know,’’ replied Stephen. “Let’s just do what everyone else is doing!’’

Wednesday, August 29, 2012A group of students were preparing an activity to

determine whether certain materials will float or sink when placed in water. Before the experiment started, one student said, “If a sponge is placed in water, then the sponge will float.” This statement is a………..

F a conclusionG a factH an observationJ a prediction/hypothesis

Wednesday, August 29, 2012A group of students were preparing an activity to

determine whether certain materials will float or sink when placed in water. Before the experiment started, one student said, “If a sponge is placed in water, then the sponge will float.” This statement is a………..

J a prediction/hypothesisA hypothesis is an educated guess based upon background knowledge. It is always written as an if…, then statement with no personal pronouns.

Thursday, August 30, 2012• A student thinks that orange juice will freeze faster than any

other substance. She fills identical containers with the same amount of different liquids, then places each in the freezer. She checks them every five minutes and discovers that the orange juice is the last one to freeze and the water is the first to freeze. Which should the student do next?

A Change her results to match her original hypothesis.B Repeat her investigation to see if her results are the

same.C Conclude that investigations can only be performed on

water.D Tell her friends that investigations at school work better

than at home.

Thursday, August 30, 2012• A student thinks that orange juice will freeze faster than any

other substance. She fills identical containers with the same amount of different liquids, then places each in the freezer. She checks them every five minutes and discovers that the orange juice is the last one to freeze and the water is the first to freeze. Which should the student do next?

B Repeat her investigation to see if her results are the same.The more trials that are done, the better the data collected. Eliminates human error.

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Friday, August 31, 2012

In an experiment, Jackson tested to see how the size of rocks affects the amount of dirt that washes away when water flows downhill. Which variable was manipulated?

F Amount of waterG Slope of the hillH Size of the rocksJ Type of dirt

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Friday, August 31, 2012

In an experiment, Jackson tested to see how the size of rocks affects the amount of dirt that washes away when water flows downhill. Which variable was manipulated?

H Size of the rocks

Manipulated (Independent) variable is what is being changed or tested in the lab

Tuesday, September 4, 2012

Sandy is conducting an investigation to find out which food his dog likes best. Which is the manipulated variable in his investigation?

F The color of his dog’s food dishG The kind of food he gives his dogH The amount of food he gives his dogJ The time of day he feeds his dog

Tuesday, September 4, 2012

Sandy is conducting an investigation to find out which food his dog likes best. Which is the manipulated variable in his investigation?

G The kind of food he gives his dog

Manipulated Variable – What is tested or changed in the experiment. Can only have 1 variable in an experiment

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Wednesday, September 5, 2012To find out which soil absorbs (holds) moisture best, each container shown must —

A be made of a different material

B have soil from the same place

C be tested by the same person

D contain the same amount of soil

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Wednesday, September 5, 2012To find out which soil absorbs (holds) moisture best, each container shown must —

A be made of a different material

The variable being changed is the manipulated variable.

A

Thursday, September 6, 2012A student set up an experiment to test how much bean

plants will grow in soil with salt in it. The student grew 50 plants in one group and 50 plants in the other group. The only thing that can be different in the two groups is the amount of —

F soil in each plant potG water given to each plantH salt in the soil in each plant potJ fertilizer given to each plant

Thursday, September 6, 2012A student set up an experiment to test how much bean

plants will grow in soil with salt in it. The student grew 50 plants in one group and 50 plants in the other group. The only thing that can be different in the two groups is the amount of —

H salt in the soil in each plant potWhat would need to be controlled in this experiment? List at least four different controls.

Backdrops:- These are full sized backdrops, just scale them up!- Can be Copy-Pasted out of Templates for use anywhere!

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