unit -1 Scientific Study set -2

Which variables are called left variables?

• all variables

• controlled variables

• independent variables

• all dependent variables

Why is the independent variable called the x-variable?

• its value can be changed continuously

• its value responds to changes

• it is placed on the y-axis in the graph

• it is placed on the x-axis in the graph

What are the units with independent existence called?

• physical quantity

• fundamental quantity

• fundamental unit

• derived unit

In the given equation s= vxt where's' means displacement, 'v' means velocity and 't' means time which of the following options proves its validity?

• m= m/s2

• m=msxs

• m=kgxs

• m=m/s xs

Arya says, "There are many variables in an experiment". Elle says, "Yes! There are multiple controlled variables in an experiment. Then Pooja replies that there is only one dependent variable and only one independent variable in an experiment. Who is correct or incorrect?

• Arya is correct but Elle and Pooja are incorrect.

• Elle is correct but Arya and Pooja are incorrect.

• Arya, Elle and Pooja are correct.

• Pooja is correct but Arya and Elle are incorrect.

Which fundamental units of following represents the proper relation for Newton?

• kgm-2s-2

• kgm2s-1

• kgm2s2

• kgms-2

Which of the following is a derived unit?

• Kilogram

• Second

• Kelvin

• Newton

Which fundamental units of following represents the proper relation for joule?

• kgm2s-2

• Kgm2s-1

• kgm-2s-2

• kgm-2s2

Which of the following is an example of a variable in scientific research?

• The colour of the laboratory walls.

• The size of the experiment table.

• The time it takes for a plant to grow.

• The number of people present in the room.

In a scientific study, which type of variable is intentionally changed or manipulated by the researcher?

• Independent variable

• Control variable

• Dependent variable

• Extraneous variable