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WorksheetsChapter Test: DOING SCIENTIFIC INVESTIGATIONS
Total questions: 25
Worksheet time: 15mins
It is a scientific skill that determines the obvious characteristics of an object or event using the five senses.
Classifying
Making inferences
Making measurement
Observation
Jestony is writing on his pad paper the distance covered by a walking turtle every one minute. What scientific skill is he doing?
Classifying
Making inferences
Making measurement
Observation
A man is sitting on a rock at the bank of the river and he is looking in the water. He might be lonely missing someone he loved. What scientific skills that the situation implies?
Classifying
Making inferences
Making measurement
Observation
In investigating a problem, it always begins with _____________ of things or event.
classifying
making inferences
making measurement
observation
The following are prerequisites in order to design an experiment. Which of these is the most important to understand well in order to attain a reliable result in your experiment?
Scientific skills: Observing, inferencing, measuring & classifying
Science processes: the problem, hypothesis, experimentation, analysing of data & conclusion
Identifying variables: Manipulated, responding and controlled variables
All of the above
The following statements are good Statement of the Problem that are worth doing an investigation, EXCEPT:
What makes a paper airplane stay in air longer?
What factor affects the speed of running toy car down an inclined plane?
How does a bad spirit able to posses a person?
Why is the gas in the LPG tank called liquefied when in fact it is a gas?
Jane went to the market to buy some goods with her friend Mae Ann. When she reached home she noticed that her wallet was gone. She uses scientific method to solve her problem. Which of the following intelligent guesses she formulated is NOT a good hypothesis:
I lost my wallet in the market while we were buying goods.
Mae Ann got my wallet.
I had misplaced it in the house.
Surely someone stole my wallet.
You want to know which of the two routes going to school is the shortest time to reach if you walk or use your bicycle. What experimentation would be best to use?
Count every step from your house to school as you walk.
Monitor the time of departure and arrival when using each route, then compare.
Measure each distance using meter stick and compare.
Measure the time travel on one of the route going to school and do the same on the other one as you go back from school.
Danny wants to know which shape of object (ring shape, hallow sphere, solid sphere, or disk) will reach the bottom first if he rolled them down on an inclined plane. Which data is the most appropriate that must be collected?
The masses of the object.
The length of the inclined plane.
The amount of inclination of the incline.
The time each object took to roll to the bottom.
If this variable is change, there would be an effect to the other variable.
Controlled Variable
Manipulated Variable
Responding Variable
Dependent Variable
A grade 7 science student wants to know the effect of acid rain in seed. He planted the seeds of mongo on 5 cans of soil and watered it consistently in two days with different pH of solution of water and vinegar respectively. What is the effect of the acidity of water to the number of seeds that will germinate? (Germination is the processes where seed grows into a seedling or sprout.) The possible hypotheses are:
The more acidic the water, the more seeds will germinate;
The more acidic the water, the lesser seeds will germinate;
The acidity of the water does not affect the germination of the seeds.
What is the responding variable in the hypotheses?
The acidity of the water.
The amount of water poured in each can.
The number of seed germinated.
The number of seeds planted
The type of seeds planted
A grade 7 science student wants to know the effect of acid rain in seed. He planted the seeds of mongo on 5 cans of soil and watered it consistently in two days with different pH of solution of water and vinegar respectively. What is the effect of the acidity of water to the number of seeds that will germinate? (Germination is the processes where seed grows into a seedling or sprout.) The possible hypotheses are:
The more acidic the water, the more seeds will germinate.;
The more acidic the water, the lesser seeds will germinate.;
The acidity of the water does not affect the germination of the seeds.
Which of the following is NOT a controlled variable in the hypotheses?
The amount of water poured in each can.
The number of seed germinated.
The number of seeds planted.
The type of seeds planted.
The grams of salt were put into the empty can and hammered 10 times with the same pressure. The shape of the salt became compact. What is the controlled variable?
The gram of salt.
The empty can.
The hammer.
The number of strike of the hammer.
What quantity name of measurement should be used if you measure the distance of your house from your school?
Mass
Length
Time
Current
Angelo has two sets of different sizes of rectangular wooden blocks, he uses his ruler to measure its heights. Set A measures 9 cm, 13 cm and 20 cm, while set B measures 7 cm, 10 cm and 20 cm. Which set has the larger value in terms of length?
Set A
Set B
Same value
None of them
Angelo has two sets of different sizes of rectangular wooden blocks, he uses his ruler to measure its heights. Set A measures 9 cm, 13 cm and 20 cm, while set B measures 7 cm, 10 cm and 20 cm. If he converts the sum of both set to meter, which of the following measurements is correct?
4.2 m and 3.7 m
0.42 m and 3.7 m
4200 m and 3700 m
0.42 m and 0.37 m
1. Newton: Weight; paschal: ____________; ___________: mass; __________: velocity; ampere: ____________; m3: _________
N/m2, kilogram, m/s, electric current, length
Mass, N/m2, electric current, volume
Pressure, kilogram, m/s, electric current, volume
Pressure, kilogram, speed, electric current, volume
Name the apparatus:
Test Tube
Pipette
Thermometer
Stirring rod
Name the apparatus:
Test Tube
Pipette
Thermometer
Stirring rod
It has a wide base, narrow neck and conical form, convenient laboratory experimentation for swirling liquids by hand.
Test Tube
Pipette
Erlenmeyer Flask
Bunsen burner
It is a common container in most laboratories, used for mixing, stirring, and heating chemicals. Most of these have spouts on their rims to aid in pouring.
Beaker
Erlenmeyer flask
Graduated cylinder
Test tube
The following are the proper way on heating chemicals on test tube, except:
Use a test tube holder to hold the test tube at about 450.
Move the test tube horizontally from left to right through the flame through the hottest point.
Point the mouth away from people.
Don’t remove it from flame unless it is already boiling.
Wearing of laboratory gown is a must. Why is this so?
Because it is a protocol given by the laboratory director.
Because it is nice to see that all is wearing in uniform like skilled scientists.
Because it protects you from direct contact of hazards in the laboratory.
Because it is required by the teacher.
An accident happened during your laboratory experiment. Which emergency response should you and your classmate do first?
It is your responsibility to read safety and fire alarm posters and follow the instructions during an emergency.
Know the location of the fire extinguisher, eye wash, and safety shower in your lab and know how to use them.
Notify your instructor immediately after any injury, fire or explosion, or spill.
Know the building evacuation procedures.
The following are general laboratory safety measures, EXCEPT:
Never eat or drink while working in the laboratory.
If you have long hair or loose clothes, make sure it is tied back or confined.
Wear gloves when using any hazardous or toxic agent.
Wash thoroughly with water if you happen to get in contact with a chemical.
Always clean up your work area before leaving.
