Prohibition vs No Obligation
If you use a website for homework help, you _______________ copy information.
If you use a website for homework help, you MUSTN'T copy information.
If we use mom's laptop, we _____ be careful
If we use mom's laptop, we MUST be careful
If you press the power button, the screen ______ off.
If you press the power button, the screen TURNS off.
This animal has fangs and no limbs.
What could it be?
What does it feel like?
It could/might/may be a snake.
It feels slimy. It feels like slime.
To block the light, you must use an _____ object.
opaque
(blocks all light)
You _______ write on an interactive whiteboard with a marker.
You MUSTN'T write on an interactive whiteboard with a marker.
If I want to make a video call, I ______ use a webcam.
If I want to make a video call, I HAVE TO use a webcam.
If you make a chemical change, it _____ be reversed.
If you make a chemical change, it CANNOT be reversed.
This animal has a long nose, claws, and it lives underground.
What must it be?
What does it smell like?
It must be a mole.
It smells like dirt/earth.
When liquid changes to gas, _______ happens.
When liquid changes to gas, EVAPORATION happens.
With a modern camera, you ________________ focus manually.
With a modern camera, you DON'T HAVE TO focus manually.
To melt ice you _______ add heat.
To melt ice you HAVE TO add heat.
If you turn water into ice, you perform _______
If you turn water into ice, you perform solidification
What does a grasshopper sound like?
What does it look like?
A grasshopper sounds like *chirp chirp*.
It looks small and green.
Light travels in ______.
But sometimes light can change direction. What are the two ways light changes direction?
Light travels in STRAIGHT LINES.
Reflection: light bounces off smooth surfaces
Refraction: light passes through different mediums
You _____ feed the donkeys at the zoo.
You MUSTN'T feed the donkeys at the zoo.
If you want to move left on the tablet, you ______ swipe left.
If you want to move left on the tablet, you HAVE TO swipe left.
If you heat ice, it ______
If you heat ice, it MELTS
This animal has feathers and wings.
What can't it be?
What could it be?
Can you eat it? What does it taste like?
It can't be a silkworm/ donkey/ bull/ mole/ praying mantis/ grasshopper
It could be a swan/eagle.
It tastes like...
When heat travels through a gas/liquid, it's called _____.
When heat transfers between 2 objects, it's called _____.
travels through gas/liquid: convection
transfers between objects: conduction
If you have an MP3 player, you _______________ use CDs. But if you use a CD player, you ______ use CDs.
If you have an MP3 player, you DON'T HAVE TO use CDs. But if you use a CD player, you HAVE TO use CDs.
To unlock the mobile phone, she _____ tap in the code.
To unlock the mobile phone, she HAS TO tap in the code.
When Mary ______________ (tap) the screen, she _________________ (pause) the game.
When Mary TAPS the screen, she PAUSES the game.
This object doesn't block the light.
What object must it be?
It must be a transparent object.
What is the difference between temperature and heat?
When you hurt yourself, you put ice on your wound. Why?
Temperature: amount of thermal energy
Heat: transfer of thermal energy
Heat causes expansion. When you are hurt, your wound gets hot & expands, it swells. So making it cold reduces the swelling.