Page 313 - Q&A-Cover_Neat

10 Blessy investigates friction.

She uses four different materials.

aluminium foil

card

paper
four boards

smooth plastic
bumpy plastic

Blessy

• puts each material on some card

• puts the end of each card onto four boards

• rolls a ball down each material.

(a) Complete the sentences.

Blessy uses the boards to

.

Blessy always uses four boards to

.

[2]

© UCLES 2020 0846/01/O/N/20