Q&A - PSLE Science

[meimeitan]

Hi!


Thanks for your help. Another question is:

Which part of the aquatic plant allow it to float?

Thanks.

[tianzhu]

meimeitan:

Which part of the aquatic plant allow it to float?

Hi

This is a general question.
Is it the actual question or a summary from another question?

I guess the answer depends on the species or types of floating plants.

For water hyacinth, air spaces in leaf stalk help to keep the plant afloat.

Best wishes

[meimeitan]

Hi! TianZhu


Thanks for your smart guessing. Yes, it is water hyacinth. Thanks for your help.

:lol:

[tianzhu]

meimeitan:

Thanks for your smart guessing.

Hi

You're welcome.

Hope my guess for TOTO can be so accurate as well.

Best wishes

[meimeitan]

Hi! Ha ha …


Before going to try your luck, pls help one more question that my son asked. Thanks.

If I put a clear plastic sheet in between the screen and the torch, is there any shadow cast on the screen?

Thanks.

[tianzhu]

Hi meimeitan


In primary science, students learned that light travels in a straight line.

A shadow are made when an object blocks light.

Opaque objects make a dark shadow. Translucent objects will cast a light shadow. Transparent objects cast little or no shadows.

As clear plastic sheet is transparent,you can take no as the answer.

Best wishes

[meimeitan]

Hi


Thank you.

[meimeitan]

Hi TianZhu


Thank you.

[tianzhu]

meimeitan:

Hi TianZhu


Thank you.

Hi

You're welcome.

Best wishes

[meimeitan]

Hi Everyone


I am busy with posting questions here this morning. Thanks for all experts’ effort. I learn a lot.

The science question is as follow:

Group X envelope and ballon
Group Y cheese and silk
Group Z thread disposable cup

Which one of the above items is grouped incorrectedly?

The answers provided as:

(1) envelope
(2) cheese
(3) disposable cup
(4) thread

Thanks.