Read the following statements given by Suresh about a metal box containing some coloured beads.
1. The box rattles when shaken.
2. The box is soft.
3. The box cannot be broken easily.
4. Coloured beads cannot be seen in the box when it is closed.
Which of the above statements indicate that the box is made of a metal?
A1 and 3 only
B2 and 3 only
C3 and 4 only
D1, 3 and 4 only
The given figure illustrates the changes in lung volume during the process of breathing.
The change from Q to R indicates the
A Movement of air out of the lungs
B Ribs move upward and outward
C Expansion of thoracic cavity
D Movement of diaphragm away from the lung.
Three friends made following statements
about the muscles present in our body.
Sarita : Muscles P never take rest. They are found in the organ which does not function under our control.
Gaurav : Muscles Q function under our control and are involved in the movement of body.
Rashmi : Muscles R work on their own but can get fatigued. They are found in our heart.
Which of these friends made incorrect statement?
BGaurav and Sarita only
DSarita and Rashmi only