CBSE Class 8   CBSE Class 8 Science

About the CBSE Class 8 Science category (1)
Make sketches of animal and plant cells. State three differences between them (1)
State the differences between eukaryotes and prokaryotes (1)
Write short notes on the following. Cytoplasm Nucleus of a cell (1)
The size of the cells of an organism has no relation with the size of its body (1)
Why do plant cells have an additional layer surrounding the cell membrane? (1)
Cells consist of many organelles, yet we do not call any of these organelles as structural and functional unit of living organisms (1)
Explain why chloroplasts are found only in plant cells (1)
‘Cells are the basic structural units of living organisms’ (1)
Where are chromosomes found in a cell? State their function (1)
Make a sketch of the human nerve cell. What function do nerve cells perform? (1)
Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school (1)
The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train (1)
A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum? (1)
With the help of an activity, explain how will you measure the time period of a simple pendulum (1)
Figure shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster? (1)
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 a.m (1)
Boojho goes to the football ground to play football (1)
Distance between Bholu’s and Golu’s house is 9 km (1)
Given below as figure is the distance-time graph of the motion of an object (1)
Show the shape of the distance-time graph for the motion in the following cases (1)
Suppose the two photographs, shown in figures given below (1)
Classify the following as motion along a straight line, circular or oscillatory motion (1)
Plot a distance-time graph of the tip of the second hand of a clock by selecting 4 points on x-axis and y-axis respectively. The circumference of the circle traced by the second hand is 64 cm (1)
Starting from A, Paheli moves along a rectangular path ABCD as shown in figure below. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform (1)
A spaceship travels 36,000 km in one hour. Express its speed in km/s (1)
Complete the data of the table given below with the help of the distance-time graph given in figure (1)
Explain with the help of an example that the states of rest and motion are relative terms (1)
Distinguish between uniform and non-uniform motion (1)
Distinguish between the following. Cell and Battery ,An Open Switch and A Close Switch (1)