Which statement does NOT describes a compound?
Can be broken by chemical means
Composed of two atoms bond together
Composed of two or more elements that bond together
Has a unique property that are different individual elements
What skill is used by a scientist when he listens to the sounds that are produced by whales?
Drawing conclusions
Making a hypothesis
Interpreting data
Making observations
Which pair of substances and mixtures is INCORRECT according to their use?
Silver and gold: jewelry making
oxygen and carbon dioxide: respiration and photosynthesis
iodized salt: iodine deficiency supplement
Hydrogen peroxide: wine making
What is the purpose of doing multiple trials in an experiment?
To double check the results so they are the same each time.
To make sure the procedure is done correctly every time.
Eliminate observations that are not typical and error free
To get as much data as possible.
A cough syrup is an example of what substance?
Mixture
Solution
Colloid
Suspension
What substance dissolved another substance in a greater amount?
Niether solute nor solvent
Solute
Solvent
Solution
A compound is composed of two or more elements combined chemically?
Table salt
Sugar
Chalk
24 Karat Gold
What is the method of gathering information by using our senses in a scientific investigation?
experiment
inference
observation
investigation
How many mL of isopropyl alcohol are present in a 200 mL of 70% alcohol solution?
140 mL
100 mL
70 mL
200 mL
What type of solution in which there is a relatively small amount of solute dissolved in the solution?
Saturated
Supersaturated
Concentrated
Diluted
Which material is BEST conductor of electricity?
A yellowish-greenish poisonous gas
A gel-like and soft material
A shiny and malleable solid
Dull and brittle crystalline solid
Why does an increase in temperature of the solvent will speed up the dissolving process?
The higher the temperature, the solute dissolves slowly
The lower the temperature, the solute dissolves quickly
The higher the temperature, the solute dissolves quickly
The lower the temperature, the solute dissolves slowly
In an experiment, what variable needs to be controlled to determine the effect of fertilizer on the growth of an orchid plant?
orchid plants and fertilizer
the concentration of fertilizer to be used
the orchid plants that will be treated with fertilizer
growth of orchid plant
What is the correct order of the scientific method?
Problem,interpretation, hypothesis, experiment, conclusion
Problem,hypothesis,experiment,conclusion,interpretation
Problem, hypothesis, experiment, interpretation, conclusion
Hypothesis,experimentation,interpretation,problem,conclusion
A scientist conducted an experiment to determine how the amount of salt in a body of water affect the number of plants that can be live in water. Which is the independent variable?
Temperature of the water
Water
Number of plants in the water
Amount of salt in water
In an experiment, Mr. Crab asks his staff to prepare and acid solution. What is the proper way of mixing water and an acid?
Mix acid and water in a container at the same time
Add water directly in the concentrated acid container
Add acid to water
Ask your Manager's supervision to mix the acid and water
What do you call the information gathered during experiments?
Data
Theory
Conclusion
Hypothesis
How will you prepare an unsaturated solution?
Add a lesser amount of powder to the liquid
Freeze the mixture
Add a larger amount of solute in a lower amount of solvent
Stir the powder in the liquid
Salt is made up of what elements?
Sodium and Oxygen
Sodium and Chlorine
Sodium and Copper
Sodium and chloride
What is the effect of the amount of fertilizer on the BEST growth of the orchid plant?
Option C
Option A
Option C
Option B
A sugar solution was made by dissolving one teaspoon of sugar in one glass of water. What is the solute?
1 teaspoon of sugar
sugar and teaspoon
1 glass of water
sugar and water
Which hypothesis is written correctly?
If I freeze a tennis ball, then it will not bounce as high
If I heat up a tennis ball it will bounce high
It will not bounce as high as one that is not frozen
If frozen tennis balls will not bounce as high
How does the solubility of a solid change when the temperature of the liquid solvent is increased?
The solubility decreases
The solubility increases
There is no change in the solubility
The change in solubility is unprdictable
Mixture of different materials combined keeping their own properties. Which is an example of a mixture?
Sugar
Seasoning
Water
Rock salt
Which of the following substance can be used as alternative antiseptic solution to a wound?
Muriatic acid
Wine
Vinegar
Baking soda