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Q1 ASSESSMENT

Total questions: 33

Worksheet time: 7mins

Name
Class
Date
1.

It is a systematic way of solving a problem or explaining phenomena.

a)

Scientific method

b)

Scientific attitude

c)

System method

2.

It is a statement of knowledge gained through senses or through the use of scientific equipment

a)

Stating the problem

b)

Hypothesis

c)

Observation

d)

Conclusion

3.

Juan hypothesizes that "if more sugar is added, then the bread will rise higher". The dependent variable is__________.

a)

Age of yeast

b)

More sugar

c)

size of the bread

4.

Which part of the scientific method where you will accept or reject your hypothesis?

a)

Problem

b)

Experimentation

c)

Conclusion

5.

What makes copper suitable for electrical wiring?

a)

It is shiny

b)

It is a good conductor of heat

c)

It has high density

6.

John is looking for a material with the following characteristics: luster, malleable and ductile. Which do you think will John choose?

a)

gold

b)

plastic

c)

rubber

7.

Chalk is a mineral found in rocks. It contains carbon, oxygen and calcium atoms. Chalk is a ___________________

a)

element

b)

compound

c)

mixture

8.

Which is NOT belong to the group?

a)

Carbon dioxide

b)

gold

c)

copper

9.

The components of this substance can be separated by physical means.

a)

pure substance

b)

compound

c)

mixture

10.

The boiling point of a pure substance is _____________.

a)

it varies

b)

constant

c)

longer

11.

Instant coffee is made by dissolving a powder in hot water. Instant coffee is a _________________.

a)

compound

b)

pure substance

c)

Mixture substance

12.

You prepared coffee jelly and added crush ice to it, what type of mixture do you have?

a)

homogeneous

b)

heterogeneous

13.

Oxides are formed when an element is burned. These oxides exhibit different acidities. The red litmus paper turns into blue of the oxide of magnesium. Therefore oxide of magnesium is _____.

a)

an acid

b)

a base

c)

neutral

14.

These are naturally red, blue, or violet plant pigments present in the cell sap of many flowers, fruits, and vegetables that produce specific colors in solutions of different acidity or basicity.

a)

Anthocyanin

b)

Hemicyanine

c)

Neutrocyanine

15.

A distilled water has a pH of 7, which means that the distilled water is______

a)

acid

b)

base

c)

neutral

16.

Which pH number has the greatest acidic concentration?

a)

pH 1

b)

pH 5

17.

Which statement is TRUE about the saturated solution?

a)

It contains less than the solute it can be dissolved

b)

There are undissolved solid particles left.

c)

All the solid substances are totally dissolves

18.

A coffee dissolves faster in hot water than in cold water. What factor affects the rate of dissolution?

a)

stirring

b)

temperature

c)

pressure

19.

NaCl (salt) is made up of Sodium and Chlorine, CO2 is made up of _____.

a)

carbon and dioxide

b)

carbon and oxygen

20.

Which is an example of a solution?

a)

adobo

b)

salt and crushed pepper

c)

softdrinks

21.

The ______________________describes the relative amounts of solute and solvent in a given volume of solution.

a)

solubility

b)

concentration

c)

solution

22.

What is the concentration of a solution in which 15 grams of sugar is dissolved in 200 mL of water?

a)

7.5 %

b)

75%

c)

.075%

23.

A solution contains 28% phosphoric acid by mass. This means that________________.

a)

1 mL of this solution contains 28 g of phosphoric acid

b)

1 L of this solution contains 28 mL of phosphoric acid

c)

100 mL of this solution contains 28 g of phosphoric acid

24.

If you prepared a juice solution and wanted it to be more concentrated, What will you do?

a)

Add more water

b)

Add more powdered juice

c)

Add more water and powdered juice

25.

The air, sea water, shampoo and coins are sample of _____.

a)

Pure substance

b)

Mixture

26.

You put too much orange juice in your glass of water, how are you going to dilute it?

a)

Add more orange juice

b)

Add more water

27.

Rearrange the parts of the Scientific Investigation

Rearrange the method of scientific investigation

A. Conclusion

B. Problem

C. Collect and analyze the results

D. Formulate hypothesis

E. Research

F. Communicate the results

G. Experimentation

a)

B-E-D-G-C-A-F

b)

B-D-E-C-G-F-A

28.

What is the % by volume of 2mL isopropyl alcohol to 50 mL of alcohol solution

a)

6%

b)

4%

29.

Which best describes a mixture?

1. It is always heterogeneous

2. It is made up of two or more kinds of substances.

3. Each of its composition retain its own characteristic or properties

4. The proportions can be altered as desired.

a)

1, 2, and 3

b)

2, 3, and 4

c)

1, 2, 3, and 4

30.

What is the % mass of 20 grams NaCl (salt) to 60 grams of water?

a)

3.66%

b)

3.33%

c)

33.3%

31.

After boiling seawater in a distillation setup, what is the taste of the distillate?

a)

sweet

b)

tasteless

c)

salty

32.

Which best describes a compound?

1. Its constituents can be separated by physical methods.

2. Its constituents are present in fixed proportions.

3. Its properties are similar to those of its constituents.

4. It does not contain two or more elements.

a)

1 only

b)

2 only

c)

all

33.

Which laboratory apparatus are use to measure and heat chemicals?1.Beaker, graduated cylinder, thermometer

2.Test tube, erlenmeyer flask, glass bottles

3.Tripod, wire gauze, alcohol lamp

4.Test tube holder, thongs, test tube rack

5.Dropper, funnel, pipette

a)

1 and 3

b)

3 and 4