The Ever-Evolving World of Science
Class 7 · Science
4 ideas in Class 7 Science, explained in plain words, with games and quizzes to practise.
Science as a Way of Thinking
Part of: Thinking and Connecting in Science
Science is not only facts to remember. It is a way of thinking that asks questions, tries experiments and stays open to the unknown. Asking a good question can matter as much as finding an answer, and one result often leads to new questions.
Why it matters. A child who sees science as asking and testing learns to wonder, check ideas and notice how people affect nature, instead of just memorising lines for tests.
Try it in two minutes
- Pick an everyday thing, like a kettle or a kite, and ask your child to think of three questions about it.
- Choose one question and think of a simple way to test it safely at home.
- Talk about what new question the result brings up.
Try at home. Say an odd answer such as 'Because it was cold' and see how many different questions your child can invent for it.
Connected Fields of Science
Part of: Thinking and Connecting in Science
Science has fields such as physics, chemistry, biology and earth sciences. A question about sour fruit is about materials, a question about how plants feed is about life, and a question about shadows is about light. The fields are connected and borrow ideas from each other.
Why it matters. Seeing links between fields helps a child use what they know in one place to understand something new in another.
Try it in two minutes
- Take a lamp or a torch and ask what you could ask about it: how it glows, what it is made of, how long the battery lasts.
- Sort the questions into groups: materials, electricity, change.
- Talk about which questions belong to more than one group.
Try at home. Ask your child to pick one object at home and name two fields of science that help to explain it.
Changes, Heat and Water
Part of: Change, Light and Sky
Changes happen all around us: a battery runs out, ice melts, fruits ripen, rocks break into pebbles. Some changes can be reversed, like melted ice freezing again, and some cannot. Heat flows into things and makes many changes happen, and heat from the Sun lifts water from the seas so that it can fall as rain far away.
Why it matters. Sorting changes and tracing their cause builds the habit of asking what happened, why, and whether it can be undone.
Try it in two minutes
- Put an ice cube on a plate and watch it melt. Ask why it melts.
- Make a list of changes at home, such as bread toasting or a candle burning, and sort them into can be undone and cannot be undone.
- Talk about how the Sun's heat helps make rain.
Try at home. Freeze a little water again after it melts and compare it with something that cannot be undone, like a ripe banana.
Light, Shadows and the Moving Earth
Part of: Change, Light and Sky
Light helps us see, and objects that block it cast shadows. Long ago people read the time from the position of shadows. The Earth and Moon also cast shadows, which gives eclipses. The Earth spins on its axis, giving day and night, while the Moon goes around the Earth and the Earth goes around the Sun.
Why it matters. Light, shadows and the movements of the Earth and Moon explain day and night, time and eclipses, and show how everyday observations lead to big ideas.
Try it in two minutes
- On a sunny day, stand a stick in the ground and mark the end of its shadow now and in an hour.
- Talk about what changed and what it says about time.
- Use a torch and a ball in a dark room to show day and night on the ball.
Try at home. Make a shadow puppet with a torch and talk about why the shadow gets bigger as the puppet gets closer to the light.
What your child will practise
- Quiz: Changes, Heat and Water (8 questions)
- Quiz: Connected Fields of Science (8 questions)
- Quiz: Light, Shadows and the Moving Earth (8 questions)
- Quiz: Science as a Way of Thinking (8 questions)