Science And Math Quiz Grade 7
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Science and math are the most common subject that gives students hard time in different schools. Are you having some difficulties when it comes to math or science? Then the quiz below is exactly what you need to refresh your mind and learn some of the basic things you should know about the two in the seventh grade. Give it a try!
- 1.
- PHYSICS;
- A.
SPEED CHANGES
- B.
DIRECTION
- C.
POSITION CHANGES WITH RESPECT TO FIXED POINT
- D.
NONE OF THESE
Correct Answer
C. POSITION CHANGES WITH RESPECT TO FIXED POINTExplanation
A body is said to be in motion if its position changes with respect to a fixed point. This means that if the body moves from one location to another, it is considered to be in motion. The other options, such as speed changes and direction, may be characteristics of motion but they do not define motion itself. Therefore, the correct answer is that a body is in motion if its position changes with respect to a fixed point.Rate this question:
- 2.
SOLVE THE FOLL. NUMERICAL: A BOY STANDS AT A DISTANCE OF 168m FROM A HIGH WALL. HE SINGS A SONG AND HEARS THE ECHO AFTER 1 SECOND. CALCULATE THE SPEED OF AIR.
- A.
345 m\s
- B.
380 m\s
- C.
336 m\s
- D.
400 m\s
Correct Answer
C. 336 m\sExplanation
The speed of sound in air is approximately 336 m/s. This can be determined by dividing the distance traveled by the sound wave (168m) by the time it takes for the echo to reach the boy (1 second).Rate this question:
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- 3.
THE TIME PERIOD OF A WAVE IS 0.25 SECONDS. FIND ITS FREQUENCY
- A.
0 Hz
- B.
9 HZ
- C.
4 Hz
- D.
8 Hz
Correct Answer
C. 4 HzExplanation
The frequency of a wave is the number of complete cycles it completes in one second. To find the frequency, we can use the formula: frequency = 1 / time period. In this case, the time period is given as 0.25 seconds. Plugging this value into the formula, we get: frequency = 1 / 0.25 = 4 Hz. Therefore, the frequency of the wave is 4 Hz.Rate this question:
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- 4.
SOUND CAN TRAVEL IN VACCUM
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Sound cannot travel in a vacuum because it requires a medium, such as air, water, or solids, to propagate. In a vacuum, there are no particles to vibrate and transmit sound waves. Therefore, sound waves cannot travel through empty space where there is no medium.Rate this question:
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- 5.
MATH: -2+3
- A.
1
- B.
-2
- C.
-5
- D.
None of thse
Correct Answer
A. 1Explanation
It is the right answer beacuse when one positve no. and a negative no. get added, teh both get subtracted and the sign of + or - will be put of the bigger no.Rate this question:
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- 6.
IF ONE OR MAY CHROMOSOMES AE MISSING IN A CHILD AT BIRTH, IT CAUSES____________
Correct Answer
psychological problemsExplanation
If one or more chromosomes are missing in a child at birth, it can cause psychological problems. This is because chromosomes contain genetic information that plays a crucial role in the development and functioning of the brain and nervous system. The absence of certain chromosomes can disrupt the normal development of the brain, leading to various psychological issues such as cognitive impairments, learning disabilities, behavioral problems, and mental disorders.Rate this question:
- 7.
We have _____ bones in our body
Correct Answer
206Explanation
The correct answer is 206. This is the number of bones in the human body. The skeletal system is made up of 206 bones, which provide support, protection, and movement for the body. These bones vary in size and shape and are connected by joints, allowing for flexibility and mobility.Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Sep 07, 2011Quiz Created by
Rmananya
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