Science

Which of the following is a pure substance

• Water

• pure air

• gold jewelry

• soft drinks

which of the following is a mixture

• Water

• oxygen

• table salt

• soft drinks

A student would like to investigate and know how the amount of salt present in sea affects the number of plants that live in it. What will be the independent variable in this experiment

• Water

• temprature of the water

• amount of salt in sea

• number of plants in the water

Which of the following is not a solution

• Water

• red wine

• gold jewelry

• distilled water

A scientist who wants study the effects of fertilizer on plants set up an experiment did the following on the following on the plants that he gathered. Plants A gets no fertilizer. Plant B gets 5 mg of fertilizer each day, and Plant C gets 10 mg of fertilizer. each among Plant A,B, and C is the control group

• A

• B

• C

• A,B,C

To communicate, the results of an experiment,graphing is one of the skills that students should learn. Which step of the scientific method uses graph.

• presenting data

• drawing conclusion

• Formulating hypothesis

• Identifying the problem

When a small amount of iodine is dissolved in alcohol,what part of the solution is alcohol?

• solvent

• solution

• saturation

• unsaturated

which of the following terms is used to describe a solution if it contains as much dissolved solute as it can hold under a given set of of conditions?

• unsaturated solution

• Supersaturated solution

• saturated solution

• dilutesolution

it is a simple statement that presents a possible solution to the problem.

• hypothesis

• fair test

• conclusion

• scientific method

• expire men

it is a simple statement that presents a possible solution to the problem.

• hypothesis

• fair test

• conclusion

• scientific method

• expirement