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WorksheetsQ1 ASSESSMENT
Total questions: 33
Worksheet time: 7mins
It is a systematic way of solving a problem or explaining phenomena.
Scientific method
Scientific attitude
System method
It is a statement of knowledge gained through senses or through the use of scientific equipment
Stating the problem
Hypothesis
Observation
Conclusion
Juan hypothesizes that "if more sugar is added, then the bread will rise higher". The dependent variable is__________.
Age of yeast
More sugar
size of the bread
Which part of the scientific method where you will accept or reject your hypothesis?
Problem
Experimentation
Conclusion
What makes copper suitable for electrical wiring?
It is shiny
It is a good conductor of heat
It has high density
John is looking for a material with the following characteristics: luster, malleable and ductile. Which do you think will John choose?
gold
plastic
rubber
Chalk is a mineral found in rocks. It contains carbon, oxygen and calcium atoms. Chalk is a ___________________
element
compound
mixture
Which is NOT belong to the group?
Carbon dioxide
gold
copper
The components of this substance can be separated by physical means.
pure substance
compound
mixture
The boiling point of a pure substance is _____________.
it varies
constant
longer
Instant coffee is made by dissolving a powder in hot water. Instant coffee is a _________________.
compound
pure substance
Mixture substance
You prepared coffee jelly and added crush ice to it, what type of mixture do you have?
homogeneous
heterogeneous
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 _____.
an acid
a base
neutral
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.
Anthocyanin
Hemicyanine
Neutrocyanine
A distilled water has a pH of 7, which means that the distilled water is______
acid
base
neutral
Which pH number has the greatest acidic concentration?
pH 1
pH 5
Which statement is TRUE about the saturated solution?
It contains less than the solute it can be dissolved
There are undissolved solid particles left.
All the solid substances are totally dissolves
A coffee dissolves faster in hot water than in cold water. What factor affects the rate of dissolution?
stirring
temperature
pressure
NaCl (salt) is made up of Sodium and Chlorine, CO2 is made up of _____.
carbon and dioxide
carbon and oxygen
Which is an example of a solution?
adobo
salt and crushed pepper
softdrinks
The ______________________describes the relative amounts of solute and solvent in a given volume of solution.
solubility
concentration
solution
What is the concentration of a solution in which 15 grams of sugar is dissolved in 200 mL of water?
7.5 %
75%
.075%
A solution contains 28% phosphoric acid by mass. This means that________________.
1 mL of this solution contains 28 g of phosphoric acid
1 L of this solution contains 28 mL of phosphoric acid
100 mL of this solution contains 28 g of phosphoric acid
If you prepared a juice solution and wanted it to be more concentrated, What will you do?
Add more water
Add more powdered juice
Add more water and powdered juice
The air, sea water, shampoo and coins are sample of _____.
Pure substance
Mixture
You put too much orange juice in your glass of water, how are you going to dilute it?
Add more orange juice
Add more water
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
B-E-D-G-C-A-F
B-D-E-C-G-F-A
What is the % by volume of 2mL isopropyl alcohol to 50 mL of alcohol solution
6%
4%
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.
1, 2, and 3
2, 3, and 4
1, 2, 3, and 4
What is the % mass of 20 grams NaCl (salt) to 60 grams of water?
3.66%
3.33%
33.3%
After boiling seawater in a distillation setup, what is the taste of the distillate?
sweet
tasteless
salty
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.
1 only
2 only
all
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
1 and 3
3 and 4
