Access restricted
Access to study materials is restricted. You are not logged in to Opiq.
A valid license for package „Erakasutaja 2024/25”, „Õpilane 2024/25”, „Õpilane 2024/25 - SOODUSHIND!”, „Õpilane 2024/25 – isiklik”, „Õpilane 2024/25 isiklik: eesti ja venekeelne” or „Õpilane 2024/25: eesti ja venekeelne” is required to use the kit. Click the link with the package name to learn more about the package and order a license.
If you have a valid license, log in to view the chapter.
Chapter topics:
- Oxygen
- Oxygen is needed for burning
- Bonus: Experiment with mice
- Living things need oxygen
- Oxygen is also needed to decompose dead organisms
- Sometimes there is not enough oxygen in the air
- Bonus: Ozone layer
- Important terms
- I now know that…
A valid license for package „Erakasutaja 2024/25”, „Õpilane 2024/25”, „Õpilane 2024/25 - SOODUSHIND!”, „Õpilane 2024/25 – isiklik”, „Õpilane 2024/25 isiklik: eesti ja venekeelne” or „Õpilane 2024/25: eesti ja venekeelne” is required to use the kit. Click the link with the package name to learn more about the package and order a license.
If you have a valid license, log in to view the chapter.
- Service provided by Star Cloud LLC