PHYSICS_IPT PREPARATION_SCIENCE 8th GRADE

Sound waves can be shown on oscilloscope. What happen to the loudness of the sound between X and Y?

• decreases

• increases

• stay the same

• stable

Sound waves can be shown on oscilloscope. What happen to the amplitude of the sound between X and Y?

• decreases

• increases

• stay the same

• stable

Sound waves can be shown on oscilloscope. What happen to the pitch of the sound between X and Y?

• decreases

• increases

• stay the same

• change

Sound waves can be shown on oscilloscope. What happen to the frequency of the sound between X and Y?

• decreases

• increases

• stay the same

• change

Two others properties of most metal are ....

• brittle and ductille

• ductile and heat insulators

• high melting point and ductile

• low melting point and ductile

Ahmad has five different materials. He uses an electric circuit to find out which of the materials are metals. This is the apparatus he uses.

Descibe how Ahmad uses the apparatus to find out if the materials is a metal! What will she see if the material is metal?

• put material between the clips, turn the switch on. The lamp lights

• put material between the clips, then turn the switch off. The lamp lights

• put material between the clips, turn the switch on. The lamp off

• put material between the clips, turn the switch off. The lamp off

White lights made up of several colours including blue, green, and red. Ahmad investigates the use of red filter. Look at the apparatus he uses!

He shines different colours of light at the filter.

He observes the colour of light (if any) that comes through the filter.

Complete this results table!

• red, blue, red

• red, no light, red

• red, green, white

• red, green, red

Yuri is exercising. Which process releases energy in Yuri's muscles when he exercises?

• movement

• nutrition

• perspiration

• respiration

Yuri is exercising. Which process releases energy in Yuri's muscles when he exercises? Complete the word equation for this process!

• oxygen + carbon dioxide ---> glucose + water

• oxygen + glucose ---> carbon dioxide + water

• oxygen + water ---> carbon dioxide + glucose

• oxygen + glucose ---> carbon dioxide + glucose

See the graph!

Calculate the speed of cyclist!

• 2 m/s

• 5 m/s

• 20 m/s

• 50 m/s