Maybe around 350 years, depending on the carbon cycle and the time taken through steps.
21. light changes its direction when travelling through a new medium because denser mediums have a higher angle of refraction.
Answer:
1.1 Two poles: North and South Poles.
1.2 - Staple pin - Nail - Tip of my phone charger - Metal keys - Cloth Hanger
1.3 - Wooden bed cot - Plastic pen - Game pad - Wooden shelf - Paper - A T-shirt
1.4 Yes
1.5 No
