☰ Year plan · Science

Blood pressure, wind, plant tissues and humidity

Week 12 · 2-3 Physical Factors (B): blood pressure, wind and wind systems, wind speed and plant tissues, humidity, effects of humidity on people and living things, osmoregulation, the data-collection activities · 3 lessons
Answers are for parents and teachers.
1
Air holds 4.5 g of vapour per m³ and could hold 18 g. Find the relative humidity.
2
Place P has 998 mbar and place Q has 1006 mbar. Which way does the wind blow?
3
Write a blood pressure of 125/85 mmHg in words and find the difference between the two numbers.
4
Name the three plant tissues and give one job of each.
5
Explain why sweat cools the body only when it evaporates.