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WorksheetsScience 7 LONG TEST
Total questions: 24
Worksheet time: 18mins
Balloon needed helium to float. Helium would be classified as
A. A homogeneous mixture
B. A heterogeneous mixture
C. An element
D. A compound
Two substances physically combined and that appears the same throughout is classified as.
A. A homogeneous mixture
B. A heterogeneous mixture
C. An element
D. A compound
We are using table salt in cooking different dishes. Table salt, also known as sodium chloride would be classified as
A. A homogeneous mixture
B. A heterogeneous mixture
C. An element
D. A compound
Evaporation is one of the processes of separating mixture which is most applicable in:
A. Separating solid from liquid
B. separate the substances that dissolved in water
C. separate substances that attracted to a magnetic field
D. separating 2 or more liquids
Which of the following pair of mixture is incorrect.
A. Homogeneous-Pizza
B. Homogeneous-Coffee
C. Heterogeneous- Soil and Water
D. Heterogeneous- Oil and water
If all the following are homogeneous mixtures, which does not belong to the group?
A. Soft drinks
B. Coffee
C. Orange Juice
D. Halo-halo
What characteristic/s distinguish a mixture from a substance?
A. Components of a mixture can be mixed in any proportion while substances have definite composition.
B. Pure substances are always homogeneous while mixtures both homogeneous and heterogeneous.
C. Pure substances have definite boiling and melting point while mixtures vary.
D. All of the above
Which of the following statement is TRUE about solution?
A. Both solute and solvent are of equal amount.
B. Solute is a component of a solution that is in large amount.
C. Solvent is a component of a solution that is in smaller amount.
D. Solute is a component of a solution that is being dissolved usually present in smaller amount.
What best describes an unsaturated solution?
A. It has dissolved solute.
B. It tends to be darker in color.
C. It normally does not have undissolved solute.
D. It has undissolved solute that can be seen in the solution
Your mother asked you to prepare a milk for you sister. You put 1 scoop of powdered milk and sugar in a 1 glass of water. You stir it well. What type of solution do you expect to form?
A. Saturated because of the less amount of solvent
B. Saturated because there is a sugar added so it will not dissolve
C. Unsaturated because there is great amount of solvent
D. Unsaturated because there is a less of solute added and it will be dissolved
You prepared a cup of coffee to your father. You put 3 scoops of coffee powder and sugar in a 1 glass of water. You smelled a strong aroma of coffee. What is this type of solution ?
A. Saturated
B. Supersaturated
C. Unsaturated
D. Undersaturated
Alcohol as disinfectant is normally sold with 35ml ethyl or isopropyl alcohol. What is the percentage of alcohol is present in a 100 mL solution?
A. 35 %
B. 60 %
C. 70 %
D. 75 %
You want to investigate the effect of sambong leaves extracts as medicine for cough. You decided to set up an experiment to find out. In a scientific investigation what is the first step?
Communicate result
Collect and Analyze the data
Observation
Formulate a question
After experiment, you accept the hypothesis that an increase in the o amount of cow manure fertilizer dissolved in water will mean an increase in the acidity of the soil mixture. Which component of a scientific investigation is being described?
Interpreting data
Making a conclusion
Writing an observation
Defining a problem
After conducting a scientific investigation on sinaw-sinaw plant extract as an effective treatment to control the growth of E.coli, Carl Joseph headed the group participation in a Regional Science Fair to tell about their findings.This scenario describes which component of a scientific investigation?
Formulating a generalization
Stating a problem
Communicating with others
Drafting a hypothesis
In science class, activities are performed to test a stated hypothesis. These activities are called
Control
Variables
Data
Experiment
The tailors needed pins on their garments. The pins are attracted to a magnet because they are classified as
Metal
Non-metal
Metalloid
Element
What property of gold makes it possible for it to be formed into different shapes?
Ductility
Hardness
Luster
Malleability
What property of iron allows it to be drawn into wires?
Brittleness
Malleability
Ductility
Conductivity
What is brass classified as due to its characteristics and properties?
An alloy
A compound
A mixture
An element
Which of the following statements is TRUE?
Ferrous sulfate cannot be broken down into simpler substances
Compounds are made up of one kind of element
Water is composed of more than two elements
Compounds are more complex than elements
What is copper sulfate classified as since it can be further subdivided into simpler substances by chemical means only?
Compound
Mixture
Element
Metals
Which of the following pair of substances is incorrect?
Compound-Water
Compound-Acid
Element-Zinc
Element-Carbon
What process is used to separate salt from water in a seawater mixture?
Condensation
Distillation
Evaporation
Filtration
